{"id":328027,"date":"2025-08-01T06:12:14","date_gmt":"2025-08-01T06:12:14","guid":{"rendered":"https:\/\/pocketoption.com\/blog\/news-events\/data\/z-statistic-2\/"},"modified":"2025-08-01T06:12:14","modified_gmt":"2025-08-01T06:12:14","slug":"z-statistic","status":"publish","type":"post","link":"https:\/\/pocketoption.com\/blog\/vt\/knowledge-base\/learning\/z-statistic\/","title":{"rendered":"Th\u1ed1ng k\u00ea Z: Hi\u1ec3u t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh"},"content":{"rendered":"<div id=\"root\"><div id=\"wrap-img-root\"><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":327168,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17],"tags":[37,28,44],"class_list":["post-328027","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learning","tag-indicator","tag-investment","tag-strategy"],"acf":{"h1":"Th\u1ed1ng k\u00ea Z trong Ph\u00e2n t\u00edch T\u00e0i ch\u00ednh: T\u1ed5ng Quan To\u00e0n Di\u1ec7n","h1_source":{"label":"H1","type":"text","formatted_value":"Th\u1ed1ng k\u00ea Z trong Ph\u00e2n t\u00edch T\u00e0i ch\u00ednh: T\u1ed5ng Quan To\u00e0n Di\u1ec7n"},"description":"Kh\u00e1m ph\u00e1 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a th\u1ed1ng k\u00ea z trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh v\u00e0 \u1ee9ng d\u1ee5ng hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3 trong c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch.","description_source":{"label":"Description","type":"textarea","formatted_value":"Kh\u00e1m ph\u00e1 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a th\u1ed1ng k\u00ea z trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh v\u00e0 \u1ee9ng d\u1ee5ng hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3 trong c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch."},"intro":"Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh, cung c\u1ea5p nh\u1eefng hi\u1ec3u bi\u1ebft qu\u00fd gi\u00e1 v\u1ec1 c\u00e1c m\u00f4 h\u00ecnh th\u1ecb tr\u01b0\u1eddng v\u00e0 h\u00e0nh vi c\u1ee7a nh\u00e0 \u0111\u1ea7u t\u01b0. B\u00e0i vi\u1ebft n\u00e0y xem x\u00e9t t\u1ea7m quan tr\u1ecdng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3, h\u1ed7 tr\u1ee3 c\u00e1c nh\u00e0 giao d\u1ecbch v\u00e0 nh\u00e0 \u0111\u1ea7u t\u01b0 trong vi\u1ec7c \u0111i\u1ec1u h\u01b0\u1edbng th\u1ebf gi\u1edbi t\u00e0i ch\u00ednh ph\u1ee9c t\u1ea1p v\u1edbi c\u00e1c quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c th\u00f4ng tin t\u1ed1t h\u01a1n.","intro_source":{"label":"Intro","type":"text","formatted_value":"Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh, cung c\u1ea5p nh\u1eefng hi\u1ec3u bi\u1ebft qu\u00fd gi\u00e1 v\u1ec1 c\u00e1c m\u00f4 h\u00ecnh th\u1ecb tr\u01b0\u1eddng v\u00e0 h\u00e0nh vi c\u1ee7a nh\u00e0 \u0111\u1ea7u t\u01b0. B\u00e0i vi\u1ebft n\u00e0y xem x\u00e9t t\u1ea7m quan tr\u1ecdng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3, h\u1ed7 tr\u1ee3 c\u00e1c nh\u00e0 giao d\u1ecbch v\u00e0 nh\u00e0 \u0111\u1ea7u t\u01b0 trong vi\u1ec7c \u0111i\u1ec1u h\u01b0\u1edbng th\u1ebf gi\u1edbi t\u00e0i ch\u00ednh ph\u1ee9c t\u1ea1p v\u1edbi c\u00e1c quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c th\u00f4ng tin t\u1ed1t h\u01a1n."},"body_html":"<div class=\"custom-html-container\">\n  <h2>Gi\u1ea3i m\u00e3 Ch\u1ec9 s\u1ed1<\/h2>\n  <p>Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 n\u1ec1n t\u1ea3ng trong ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 m\u00e0 m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 l\u1ec7ch kh\u1ecfi trung b\u00ecnh c\u1ee7a m\u1ed9t t\u1eadp d\u1eef li\u1ec7u theo ti\u00eau chu\u1ea9n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. N\u00f3 cho ph\u00e9p c\u00e1c nh\u00e0 giao d\u1ecbch v\u00e0 nh\u00e0 ph\u00e2n t\u00edch t\u00e0i ch\u00ednh di\u1ec5n gi\u1ea3i d\u1eef li\u1ec7u th\u1ecb tr\u01b0\u1eddng, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng d\u1ef1 b\u00e1o xu h\u01b0\u1edbng v\u00e0 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng kh\u00e1i ni\u1ec7m n\u00e0y, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 m\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ed9t t\u00e0i s\u1ea3n l\u1ec7ch kh\u1ecfi trung b\u00ecnh, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c l\u1ef1a ch\u1ecdn \u0111\u1ea7u t\u01b0 th\u00f4ng minh h\u01a1n.<\/p>\n  <h2>Gi\u00e1 tr\u1ecb Z trong Th\u1ed1ng k\u00ea l\u00e0 g\u00ec?<\/h2>\n  <p>Gi\u00e1 tr\u1ecb z, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111i\u1ec3m z, ch\u1ec9 ra s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed9 l\u1ec7ch chu\u1ea9n m\u00e0 m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u c\u00e1ch xa trung b\u00ecnh. N\u00f3 \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch tr\u1eeb trung b\u00ecnh t\u1eeb \u0111i\u1ec3m d\u1eef li\u1ec7u v\u00e0 chia cho \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. \u0110o l\u01b0\u1eddng n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 v\u00ec n\u00f3 gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7 trong m\u1ed9t t\u1eadp d\u1eef li\u1ec7u. V\u00ed d\u1ee5, m\u1ed9t ch\u1ee9ng kho\u00e1n c\u00f3 \u0111i\u1ec3m z l\u00e0 2 l\u00e0 hai \u0111\u1ed9 l\u1ec7ch chu\u1ea9n tr\u00ean trung b\u00ecnh, ch\u1ec9 ra hi\u1ec7u su\u1ea5t cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi trung b\u00ecnh.<\/p>\n  <h2>\u00dd ngh\u0129a c\u1ee7a \u0110i\u1ec3m Z trong Th\u1ed1ng k\u00ea<\/h2>\n  <p>\u00dd ngh\u0129a c\u1ee7a \u0111i\u1ec3m s\u1ed1 n\u00e0y v\u01b0\u1ee3t ra ngo\u00e0i vi\u1ec7c t\u00ednh to\u00e1n c\u1ee7a n\u00f3, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 so s\u00e1nh. C\u00e1c nh\u00e0 ph\u00e2n t\u00edch chuy\u1ec3n \u0111\u1ed5i c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u kh\u00e1c nhau th\u00e0nh \u0111i\u1ec3m z \u0111\u1ec3 cho ph\u00e9p so s\u00e1nh tr\u00ean m\u1ed9t thang \u0111o nh\u1ea5t qu\u00e1n, b\u1ea5t k\u1ec3 \u0111\u01a1n v\u1ecb g\u1ed1c c\u1ee7a ch\u00fang. Trong t\u00e0i ch\u00ednh, vi\u1ec7c chu\u1ea9n h\u00f3a n\u00e0y r\u1ea5t quan tr\u1ecdng, cho ph\u00e9p \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c t\u00e0i s\u1ea3n kh\u00e1c nhau qua c\u00e1c khung th\u1eddi gian ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau. Do \u0111\u00f3, \u0111i\u1ec3m z tr\u1edf th\u00e0nh m\u1ed9t th\u01b0\u1edbc \u0111o quan tr\u1ecdng cho ph\u00e2n t\u00edch so s\u00e1nh ch\u00e9o.<\/p>\n  <h2>Z \u0111\u1ea1i di\u1ec7n cho g\u00ec trong Th\u1ed1ng k\u00ea?<\/h2>\n  <p>Trong th\u1ed1ng k\u00ea, z bi\u1ec3u th\u1ecb gi\u00e1 tr\u1ecb chu\u1ea9n h\u00f3a c\u1ee7a m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u so v\u1edbi to\u00e0n b\u1ed9 t\u1eadp d\u1eef li\u1ec7u. N\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu c\u1ee7a nhi\u1ec1u b\u00e0i ki\u1ec3m tra v\u00e0 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, ch\u1eb3ng h\u1ea1n nh\u01b0 ki\u1ec3m tra gi\u1ea3 thuy\u1ebft v\u00e0 kho\u1ea3ng tin c\u1eady. Trong l\u0129nh v\u1ef1c t\u00e0i ch\u00ednh, hi\u1ec3u z \u0111\u1ea1i di\u1ec7n cho g\u00ec gi\u00fap c\u00e1c th\u00e0nh vi\u00ean th\u1ecb tr\u01b0\u1eddng \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, cho ph\u00e9p h\u1ecd \u0111\u00e1nh gi\u00e1 li\u1ec7u m\u1ed9t t\u00e0i s\u1ea3n c\u00f3 b\u1ecb \u0111\u1ecbnh gi\u00e1 qu\u00e1 cao hay qu\u00e1 th\u1ea5p.<\/p>\n  <h2>\u00dd ngh\u0129a c\u1ee7a \u0110i\u1ec3m Z D\u01b0\u01a1ng<\/h2>\n  <p>M\u1ed9t \u0111i\u1ec3m z d\u01b0\u01a1ng ch\u1ec9 ra r\u1eb1ng m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u n\u1eb1m tr\u00ean trung b\u00ecnh. Trong b\u1ed1i c\u1ea3nh t\u00e0i ch\u00ednh, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y r\u1eb1ng m\u1ed9t t\u00e0i s\u1ea3n \u0111ang ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n trung b\u00ecnh. N\u1ebfu m\u1ed9t c\u1ed5 phi\u1ebfu hi\u1ec3n th\u1ecb \u0111i\u1ec3m z d\u01b0\u01a1ng, \u0111i\u1ec1u \u0111\u00f3 ng\u1ee5 \u00fd r\u1eb1ng gi\u00e1 c\u1ed5 phi\u1ebfu v\u01b0\u1ee3t qua gi\u00e1 trung b\u00ecnh c\u1ee7a c\u00e1c c\u1ed5 phi\u1ebfu t\u01b0\u01a1ng t\u1ef1, c\u00f3 th\u1ec3 ch\u1ec9 ra hi\u1ec7u su\u1ea5t m\u1ea1nh m\u1ebd ho\u1eb7c t\u00e2m l\u00fd nh\u00e0 \u0111\u1ea7u t\u01b0 l\u1ea1c quan.<\/p>\n  <h2>\u1ee8ng d\u1ee5ng trong Th\u1ecb tr\u01b0\u1eddng T\u00e0i ch\u00ednh<\/h2>\n  <p>Vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 th\u1ed1ng k\u00ea n\u00e0y trong th\u1ecb tr\u01b0\u1eddng t\u00e0i ch\u00ednh r\u1ea5t \u0111a d\u1ea1ng v\u00e0 \u0111a chi\u1ec1u. T\u1eeb vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a c\u1ed5 phi\u1ebfu \u0111\u1ebfn \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch, n\u00f3 cung c\u1ea5p nh\u1eefng th\u00f4ng tin quan tr\u1ecdng c\u00f3 th\u1ec3 h\u01b0\u1edbng d\u1eabn c\u00e1c quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0.<\/p>\n  <ul>\n    <li><strong>\u0110\u00e1nh gi\u00e1 R\u1ee7i ro<\/strong>: C\u00f4ng c\u1ee5 n\u00e0y r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 r\u1ee7i ro li\u00ean quan \u0111\u1ebfn c\u00e1c kho\u1ea3n \u0111\u1ea7u t\u01b0 c\u1ee5 th\u1ec3. \u0110i\u1ec3m s\u1ed1 cao h\u01a1n c\u00f3 th\u1ec3 g\u1ee3i \u00fd \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng l\u1edbn h\u01a1n, ng\u1ee5 \u00fd r\u1ee7i ro cao h\u01a1n.<\/li>\n    <li><strong>T\u1ed1i \u01b0u h\u00f3a Danh m\u1ee5c<\/strong>: B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch \u0111i\u1ec3m s\u1ed1 c\u1ee7a c\u00e1c t\u00e0i s\u1ea3n kh\u00e1c nhau, c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t danh m\u1ee5c \u0111a d\u1ea1ng h\u00f3a t\u1ed1i \u01b0u c\u00e2n b\u1eb1ng r\u1ee7i ro v\u00e0 l\u1ee3i nhu\u1eadn.<\/li>\n    <li><strong>Ph\u00e1t hi\u1ec7n Xu h\u01b0\u1edbng<\/strong>: C\u00e1c nh\u00e0 giao d\u1ecbch s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng v\u00e0 c\u00e1c \u0111i\u1ec3m \u0111\u1ea3o chi\u1ec1u ti\u1ec1m n\u0103ng, h\u1ed7 tr\u1ee3 trong vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch hi\u1ec7u qu\u1ea3.<\/li>\n  <\/ul>\n  <h2>Pocket Option v\u00e0 Ch\u1ec9 s\u1ed1<\/h2>\n  <p>Pocket Option n\u1ed5i ti\u1ebfng v\u1edbi d\u1ecbch v\u1ee5 giao d\u1ecbch nhanh ch\u00f3ng, trang b\u1ecb cho c\u00e1c nh\u00e0 giao d\u1ecbch c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1ec3 \u00e1p d\u1ee5ng ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, bao g\u1ed3m ch\u1ec9 s\u1ed1 n\u00e0y, trong c\u00e1c chi\u1ebfn l\u01b0\u1ee3c c\u1ee7a h\u1ecd. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng n\u00f3, c\u00e1c nh\u00e0 giao d\u1ecbch tr\u00ean Pocket Option c\u00f3 th\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh h\u01a1n, n\u00e2ng cao kh\u1ea3 n\u0103ng d\u1ef1 \u0111o\u00e1n s\u1ef1 thay \u0111\u1ed5i c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 t\u1ed1i \u01b0u h\u00f3a k\u1ebft qu\u1ea3 giao d\u1ecbch.<\/p> [cta_button text=\"B\u1eaft \u0111\u1ea7u Giao d\u1ecbch\"]\n  <h2>S\u1ef1 Th\u1eadt Th\u00fa V\u1ecb<\/h2>\n  <p>B\u1ea1n c\u00f3 bi\u1ebft r\u1eb1ng kh\u00e1i ni\u1ec7m n\u00e0y c\u00f3 t\u1eeb \u0111\u1ea7u th\u1ebf k\u1ef7 20? N\u00f3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a l\u0129nh v\u1ef1c th\u1ed1ng k\u00ea r\u1ed9ng l\u1edbn h\u01a1n v\u00e0 k\u1ec3 t\u1eeb \u0111\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m t\u00e0i ch\u00ednh. Kh\u1ea3 n\u0103ng chu\u1ea9n h\u00f3a so s\u00e1nh c\u1ee7a n\u00f3 l\u00e0 v\u00f4 gi\u00e1 trong th\u1ebf gi\u1edbi d\u1ef1a tr\u00ean d\u1eef li\u1ec7u ng\u00e0y nay, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e2n t\u00edch r\u00fat ra nh\u1eefng th\u00f4ng tin c\u00f3 \u00fd ngh\u0129a t\u1eeb c\u00e1c t\u1eadp d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/p>\n  <h2>V\u00ed d\u1ee5 Minh H\u1ecda v\u1ec1 Th\u1ed1ng k\u00ea Z trong H\u00e0nh \u0111\u1ed9ng<\/h2>\n  <p>Xem x\u00e9t m\u1ed9t nh\u00e0 giao d\u1ecbch \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a hai c\u1ed5 phi\u1ebfu, C\u1ed5 phi\u1ebfu A v\u00e0 C\u1ed5 phi\u1ebfu B. C\u1ed5 phi\u1ebfu A c\u00f3 l\u1ee3i nhu\u1eadn trung b\u00ecnh l\u00e0 10% v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 2%, trong khi C\u1ed5 phi\u1ebfu B c\u00f3 l\u1ee3i nhu\u1eadn trung b\u00ecnh l\u00e0 8% v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 1,5%. N\u1ebfu C\u1ed5 phi\u1ebfu A \u0111\u1ea1t l\u1ee3i nhu\u1eadn 12% trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh, \u0111i\u1ec3m s\u1ed1 c\u1ee7a n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 (12% - 10%) \/ 2% = 1. T\u01b0\u01a1ng t\u1ef1, n\u1ebfu C\u1ed5 phi\u1ebfu B \u0111\u1ea1t 9%, \u0111i\u1ec3m s\u1ed1 c\u1ee7a n\u00f3 s\u1ebd l\u00e0 (9% - 8%) \/ 1,5% = 0,67. So s\u00e1nh n\u00e0y cho th\u1ea5y r\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a C\u1ed5 phi\u1ebfu A l\u1ec7ch nhi\u1ec1u h\u01a1n so v\u1edbi trung b\u00ecnh c\u1ee7a n\u00f3 so v\u1edbi C\u1ed5 phi\u1ebfu B, ch\u1ec9 ra s\u1ef1 bi\u1ebfn \u0111\u1ed9ng l\u1edbn h\u01a1n trong l\u1ee3i nhu\u1eadn c\u1ee7a n\u00f3.<\/p>\n  <h2>Ph\u00e2n T\u00edch So S\u00e1nh: Th\u1ed1ng k\u00ea Z So v\u1edbi C\u00e1c Bi\u1ec7n Ph\u00e1p Th\u1ed1ng K\u00ea Kh\u00e1c<\/h2>\n  <p>M\u1eb7c d\u00f9 ch\u1ec9 s\u1ed1 n\u00e0y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh, so s\u00e1nh n\u00f3 v\u1edbi c\u00e1c bi\u1ec7n ph\u00e1p th\u1ed1ng k\u00ea kh\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u to\u00e0n di\u1ec7n v\u1ec1 ti\u1ec7n \u00edch c\u1ee7a n\u00f3.<\/p>\n  <table>\n    <tr>\n      <th>C\u00f4ng c\u1ee5<\/th>\n      <th>M\u1ee5c \u0111\u00edch<\/th>\n      <th>Tr\u01b0\u1eddng h\u1ee3p S\u1eed d\u1ee5ng<\/th>\n    <\/tr>\n    <tr>\n      <td>Th\u1ed1ng k\u00ea Z<\/td>\n      <td>Chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u \u0111\u1ec3 so s\u00e1nh<\/td>\n      <td>Ph\u00e2n t\u00edch xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng<\/td>\n    <\/tr>\n    <tr>\n      <td>Th\u1ed1ng k\u00ea T<\/td>\n      <td>So s\u00e1nh trung b\u00ecnh c\u1ee7a hai nh\u00f3m<\/td>\n      <td>Ki\u1ec3m tra gi\u1ea3 thuy\u1ebft trong t\u00e0i ch\u00ednh<\/td>\n    <\/tr>\n    <tr>\n      <td>Gi\u00e1 tr\u1ecb P<\/td>\n      <td>X\u00e1c \u0111\u1ecbnh \u00fd ngh\u0129a th\u1ed1ng k\u00ea<\/td>\n      <td>X\u00e1c nh\u1eadn k\u1ebft qu\u1ea3 chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch<\/td>\n    <\/tr>\n  <\/table>\n  <p>B\u1ea3ng n\u00e0y n\u00eau b\u1eadt vai tr\u00f2 \u0111\u1ed9c \u0111\u00e1o c\u1ee7a ch\u1ec9 s\u1ed1 n\u00e0y trong vi\u1ec7c chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u cho ph\u00e2n t\u00edch so s\u00e1nh so v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 th\u1ed1ng k\u00ea kh\u00e1c.<\/p>\n  <h2>\u01afu \u0111i\u1ec3m & H\u1ea1n ch\u1ebf<\/h2>\n  <table>\n    <tr>\n      <th>\u01afu \u0111i\u1ec3m<\/th>\n      <th>H\u1ea1n ch\u1ebf<\/th>\n    <\/tr>\n    <tr>\n      <td>T\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho so s\u00e1nh chu\u1ea9n h\u00f3a<\/td>\n      <td>C\u00f3 th\u1ec3 g\u00e2y hi\u1ec3u l\u1ea7m cho c\u00e1c ph\u00e2n ph\u1ed1i kh\u00f4ng chu\u1ea9n<\/td>\n    <\/tr>\n    <tr>\n      <td>H\u1eefu \u00edch \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7<\/td>\n      <td>Y\u00eau c\u1ea7u trung b\u00ecnh v\u00e0 \u0111\u1ed9 l\u1ec7ch chu\u1ea9n ch\u00ednh x\u00e1c<\/td>\n    <\/tr>\n    <tr>\n      <td>\u00c1p d\u1ee5ng trong nhi\u1ec1u ph\u00e2n t\u00edch kh\u00e1c nhau<\/td>\n      <td>Kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c m\u1eabu nh\u1ecf<\/td>\n    <\/tr>\n  <\/table> [cta_button text=\"B\u1eaft \u0111\u1ea7u Giao d\u1ecbch\"]\n<\/div>","body_html_source":{"label":"Body HTML","type":"wysiwyg","formatted_value":"<div class=\"custom-html-container\">\n<h2>Gi\u1ea3i m\u00e3 Ch\u1ec9 s\u1ed1<\/h2>\n<p>Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 n\u1ec1n t\u1ea3ng trong ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 m\u00e0 m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 l\u1ec7ch kh\u1ecfi trung b\u00ecnh c\u1ee7a m\u1ed9t t\u1eadp d\u1eef li\u1ec7u theo ti\u00eau chu\u1ea9n \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. N\u00f3 cho ph\u00e9p c\u00e1c nh\u00e0 giao d\u1ecbch v\u00e0 nh\u00e0 ph\u00e2n t\u00edch t\u00e0i ch\u00ednh di\u1ec5n gi\u1ea3i d\u1eef li\u1ec7u th\u1ecb tr\u01b0\u1eddng, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng d\u1ef1 b\u00e1o xu h\u01b0\u1edbng v\u00e0 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng kh\u00e1i ni\u1ec7m n\u00e0y, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 m\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ed9t t\u00e0i s\u1ea3n l\u1ec7ch kh\u1ecfi trung b\u00ecnh, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c l\u1ef1a ch\u1ecdn \u0111\u1ea7u t\u01b0 th\u00f4ng minh h\u01a1n.<\/p>\n<h2>Gi\u00e1 tr\u1ecb Z trong Th\u1ed1ng k\u00ea l\u00e0 g\u00ec?<\/h2>\n<p>Gi\u00e1 tr\u1ecb z, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111i\u1ec3m z, ch\u1ec9 ra s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed9 l\u1ec7ch chu\u1ea9n m\u00e0 m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u c\u00e1ch xa trung b\u00ecnh. N\u00f3 \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch tr\u1eeb trung b\u00ecnh t\u1eeb \u0111i\u1ec3m d\u1eef li\u1ec7u v\u00e0 chia cho \u0111\u1ed9 l\u1ec7ch chu\u1ea9n. \u0110o l\u01b0\u1eddng n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 v\u00ec n\u00f3 gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7 trong m\u1ed9t t\u1eadp d\u1eef li\u1ec7u. V\u00ed d\u1ee5, m\u1ed9t ch\u1ee9ng kho\u00e1n c\u00f3 \u0111i\u1ec3m z l\u00e0 2 l\u00e0 hai \u0111\u1ed9 l\u1ec7ch chu\u1ea9n tr\u00ean trung b\u00ecnh, ch\u1ec9 ra hi\u1ec7u su\u1ea5t cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi trung b\u00ecnh.<\/p>\n<h2>\u00dd ngh\u0129a c\u1ee7a \u0110i\u1ec3m Z trong Th\u1ed1ng k\u00ea<\/h2>\n<p>\u00dd ngh\u0129a c\u1ee7a \u0111i\u1ec3m s\u1ed1 n\u00e0y v\u01b0\u1ee3t ra ngo\u00e0i vi\u1ec7c t\u00ednh to\u00e1n c\u1ee7a n\u00f3, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 so s\u00e1nh. C\u00e1c nh\u00e0 ph\u00e2n t\u00edch chuy\u1ec3n \u0111\u1ed5i c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u kh\u00e1c nhau th\u00e0nh \u0111i\u1ec3m z \u0111\u1ec3 cho ph\u00e9p so s\u00e1nh tr\u00ean m\u1ed9t thang \u0111o nh\u1ea5t qu\u00e1n, b\u1ea5t k\u1ec3 \u0111\u01a1n v\u1ecb g\u1ed1c c\u1ee7a ch\u00fang. Trong t\u00e0i ch\u00ednh, vi\u1ec7c chu\u1ea9n h\u00f3a n\u00e0y r\u1ea5t quan tr\u1ecdng, cho ph\u00e9p \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c t\u00e0i s\u1ea3n kh\u00e1c nhau qua c\u00e1c khung th\u1eddi gian ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau. Do \u0111\u00f3, \u0111i\u1ec3m z tr\u1edf th\u00e0nh m\u1ed9t th\u01b0\u1edbc \u0111o quan tr\u1ecdng cho ph\u00e2n t\u00edch so s\u00e1nh ch\u00e9o.<\/p>\n<h2>Z \u0111\u1ea1i di\u1ec7n cho g\u00ec trong Th\u1ed1ng k\u00ea?<\/h2>\n<p>Trong th\u1ed1ng k\u00ea, z bi\u1ec3u th\u1ecb gi\u00e1 tr\u1ecb chu\u1ea9n h\u00f3a c\u1ee7a m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u so v\u1edbi to\u00e0n b\u1ed9 t\u1eadp d\u1eef li\u1ec7u. N\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu c\u1ee7a nhi\u1ec1u b\u00e0i ki\u1ec3m tra v\u00e0 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, ch\u1eb3ng h\u1ea1n nh\u01b0 ki\u1ec3m tra gi\u1ea3 thuy\u1ebft v\u00e0 kho\u1ea3ng tin c\u1eady. Trong l\u0129nh v\u1ef1c t\u00e0i ch\u00ednh, hi\u1ec3u z \u0111\u1ea1i di\u1ec7n cho g\u00ec gi\u00fap c\u00e1c th\u00e0nh vi\u00ean th\u1ecb tr\u01b0\u1eddng \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, cho ph\u00e9p h\u1ecd \u0111\u00e1nh gi\u00e1 li\u1ec7u m\u1ed9t t\u00e0i s\u1ea3n c\u00f3 b\u1ecb \u0111\u1ecbnh gi\u00e1 qu\u00e1 cao hay qu\u00e1 th\u1ea5p.<\/p>\n<h2>\u00dd ngh\u0129a c\u1ee7a \u0110i\u1ec3m Z D\u01b0\u01a1ng<\/h2>\n<p>M\u1ed9t \u0111i\u1ec3m z d\u01b0\u01a1ng ch\u1ec9 ra r\u1eb1ng m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u n\u1eb1m tr\u00ean trung b\u00ecnh. Trong b\u1ed1i c\u1ea3nh t\u00e0i ch\u00ednh, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y r\u1eb1ng m\u1ed9t t\u00e0i s\u1ea3n \u0111ang ho\u1ea1t \u0111\u1ed9ng t\u1ed1t h\u01a1n trung b\u00ecnh. N\u1ebfu m\u1ed9t c\u1ed5 phi\u1ebfu hi\u1ec3n th\u1ecb \u0111i\u1ec3m z d\u01b0\u01a1ng, \u0111i\u1ec1u \u0111\u00f3 ng\u1ee5 \u00fd r\u1eb1ng gi\u00e1 c\u1ed5 phi\u1ebfu v\u01b0\u1ee3t qua gi\u00e1 trung b\u00ecnh c\u1ee7a c\u00e1c c\u1ed5 phi\u1ebfu t\u01b0\u01a1ng t\u1ef1, c\u00f3 th\u1ec3 ch\u1ec9 ra hi\u1ec7u su\u1ea5t m\u1ea1nh m\u1ebd ho\u1eb7c t\u00e2m l\u00fd nh\u00e0 \u0111\u1ea7u t\u01b0 l\u1ea1c quan.<\/p>\n<h2>\u1ee8ng d\u1ee5ng trong Th\u1ecb tr\u01b0\u1eddng T\u00e0i ch\u00ednh<\/h2>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 th\u1ed1ng k\u00ea n\u00e0y trong th\u1ecb tr\u01b0\u1eddng t\u00e0i ch\u00ednh r\u1ea5t \u0111a d\u1ea1ng v\u00e0 \u0111a chi\u1ec1u. T\u1eeb vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a c\u1ed5 phi\u1ebfu \u0111\u1ebfn \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch, n\u00f3 cung c\u1ea5p nh\u1eefng th\u00f4ng tin quan tr\u1ecdng c\u00f3 th\u1ec3 h\u01b0\u1edbng d\u1eabn c\u00e1c quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0.<\/p>\n<ul>\n<li><strong>\u0110\u00e1nh gi\u00e1 R\u1ee7i ro<\/strong>: C\u00f4ng c\u1ee5 n\u00e0y r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c \u0111\u00e1nh gi\u00e1 r\u1ee7i ro li\u00ean quan \u0111\u1ebfn c\u00e1c kho\u1ea3n \u0111\u1ea7u t\u01b0 c\u1ee5 th\u1ec3. \u0110i\u1ec3m s\u1ed1 cao h\u01a1n c\u00f3 th\u1ec3 g\u1ee3i \u00fd \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng l\u1edbn h\u01a1n, ng\u1ee5 \u00fd r\u1ee7i ro cao h\u01a1n.<\/li>\n<li><strong>T\u1ed1i \u01b0u h\u00f3a Danh m\u1ee5c<\/strong>: B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch \u0111i\u1ec3m s\u1ed1 c\u1ee7a c\u00e1c t\u00e0i s\u1ea3n kh\u00e1c nhau, c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t danh m\u1ee5c \u0111a d\u1ea1ng h\u00f3a t\u1ed1i \u01b0u c\u00e2n b\u1eb1ng r\u1ee7i ro v\u00e0 l\u1ee3i nhu\u1eadn.<\/li>\n<li><strong>Ph\u00e1t hi\u1ec7n Xu h\u01b0\u1edbng<\/strong>: C\u00e1c nh\u00e0 giao d\u1ecbch s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng v\u00e0 c\u00e1c \u0111i\u1ec3m \u0111\u1ea3o chi\u1ec1u ti\u1ec1m n\u0103ng, h\u1ed7 tr\u1ee3 trong vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<h2>Pocket Option v\u00e0 Ch\u1ec9 s\u1ed1<\/h2>\n<p>Pocket Option n\u1ed5i ti\u1ebfng v\u1edbi d\u1ecbch v\u1ee5 giao d\u1ecbch nhanh ch\u00f3ng, trang b\u1ecb cho c\u00e1c nh\u00e0 giao d\u1ecbch c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1ec3 \u00e1p d\u1ee5ng ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, bao g\u1ed3m ch\u1ec9 s\u1ed1 n\u00e0y, trong c\u00e1c chi\u1ebfn l\u01b0\u1ee3c c\u1ee7a h\u1ecd. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng n\u00f3, c\u00e1c nh\u00e0 giao d\u1ecbch tr\u00ean Pocket Option c\u00f3 th\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh h\u01a1n, n\u00e2ng cao kh\u1ea3 n\u0103ng d\u1ef1 \u0111o\u00e1n s\u1ef1 thay \u0111\u1ed5i c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 t\u1ed1i \u01b0u h\u00f3a k\u1ebft qu\u1ea3 giao d\u1ecbch.<\/p>\n    <div class=\"po-container po-container_width_article\">\n        <a href=\"\/en\/quick-start\/\" class=\"po-line-banner po-article-page__line-banner\">\n            <svg class=\"svg-image po-line-banner__logo\" fill=\"currentColor\" width=\"auto\" height=\"auto\"\n                 aria-hidden=\"true\">\n                <use href=\"#svg-img-logo-white\"><\/use>\n            <\/svg>\n            <span class=\"po-line-banner__btn\">B\u1eaft \u0111\u1ea7u Giao d\u1ecbch<\/span>\n        <\/a>\n    <\/div>\n    \n<h2>S\u1ef1 Th\u1eadt Th\u00fa V\u1ecb<\/h2>\n<p>B\u1ea1n c\u00f3 bi\u1ebft r\u1eb1ng kh\u00e1i ni\u1ec7m n\u00e0y c\u00f3 t\u1eeb \u0111\u1ea7u th\u1ebf k\u1ef7 20? N\u00f3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a l\u0129nh v\u1ef1c th\u1ed1ng k\u00ea r\u1ed9ng l\u1edbn h\u01a1n v\u00e0 k\u1ec3 t\u1eeb \u0111\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m t\u00e0i ch\u00ednh. Kh\u1ea3 n\u0103ng chu\u1ea9n h\u00f3a so s\u00e1nh c\u1ee7a n\u00f3 l\u00e0 v\u00f4 gi\u00e1 trong th\u1ebf gi\u1edbi d\u1ef1a tr\u00ean d\u1eef li\u1ec7u ng\u00e0y nay, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e2n t\u00edch r\u00fat ra nh\u1eefng th\u00f4ng tin c\u00f3 \u00fd ngh\u0129a t\u1eeb c\u00e1c t\u1eadp d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/p>\n<h2>V\u00ed d\u1ee5 Minh H\u1ecda v\u1ec1 Th\u1ed1ng k\u00ea Z trong H\u00e0nh \u0111\u1ed9ng<\/h2>\n<p>Xem x\u00e9t m\u1ed9t nh\u00e0 giao d\u1ecbch \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a hai c\u1ed5 phi\u1ebfu, C\u1ed5 phi\u1ebfu A v\u00e0 C\u1ed5 phi\u1ebfu B. C\u1ed5 phi\u1ebfu A c\u00f3 l\u1ee3i nhu\u1eadn trung b\u00ecnh l\u00e0 10% v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 2%, trong khi C\u1ed5 phi\u1ebfu B c\u00f3 l\u1ee3i nhu\u1eadn trung b\u00ecnh l\u00e0 8% v\u1edbi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 1,5%. N\u1ebfu C\u1ed5 phi\u1ebfu A \u0111\u1ea1t l\u1ee3i nhu\u1eadn 12% trong m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh, \u0111i\u1ec3m s\u1ed1 c\u1ee7a n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh l\u00e0 (12% &#8211; 10%) \/ 2% = 1. T\u01b0\u01a1ng t\u1ef1, n\u1ebfu C\u1ed5 phi\u1ebfu B \u0111\u1ea1t 9%, \u0111i\u1ec3m s\u1ed1 c\u1ee7a n\u00f3 s\u1ebd l\u00e0 (9% &#8211; 8%) \/ 1,5% = 0,67. So s\u00e1nh n\u00e0y cho th\u1ea5y r\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a C\u1ed5 phi\u1ebfu A l\u1ec7ch nhi\u1ec1u h\u01a1n so v\u1edbi trung b\u00ecnh c\u1ee7a n\u00f3 so v\u1edbi C\u1ed5 phi\u1ebfu B, ch\u1ec9 ra s\u1ef1 bi\u1ebfn \u0111\u1ed9ng l\u1edbn h\u01a1n trong l\u1ee3i nhu\u1eadn c\u1ee7a n\u00f3.<\/p>\n<h2>Ph\u00e2n T\u00edch So S\u00e1nh: Th\u1ed1ng k\u00ea Z So v\u1edbi C\u00e1c Bi\u1ec7n Ph\u00e1p Th\u1ed1ng K\u00ea Kh\u00e1c<\/h2>\n<p>M\u1eb7c d\u00f9 ch\u1ec9 s\u1ed1 n\u00e0y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh, so s\u00e1nh n\u00f3 v\u1edbi c\u00e1c bi\u1ec7n ph\u00e1p th\u1ed1ng k\u00ea kh\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u to\u00e0n di\u1ec7n v\u1ec1 ti\u1ec7n \u00edch c\u1ee7a n\u00f3.<\/p>\n<table>\n<tr>\n<th>C\u00f4ng c\u1ee5<\/th>\n<th>M\u1ee5c \u0111\u00edch<\/th>\n<th>Tr\u01b0\u1eddng h\u1ee3p S\u1eed d\u1ee5ng<\/th>\n<\/tr>\n<tr>\n<td>Th\u1ed1ng k\u00ea Z<\/td>\n<td>Chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u \u0111\u1ec3 so s\u00e1nh<\/td>\n<td>Ph\u00e2n t\u00edch xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng<\/td>\n<\/tr>\n<tr>\n<td>Th\u1ed1ng k\u00ea T<\/td>\n<td>So s\u00e1nh trung b\u00ecnh c\u1ee7a hai nh\u00f3m<\/td>\n<td>Ki\u1ec3m tra gi\u1ea3 thuy\u1ebft trong t\u00e0i ch\u00ednh<\/td>\n<\/tr>\n<tr>\n<td>Gi\u00e1 tr\u1ecb P<\/td>\n<td>X\u00e1c \u0111\u1ecbnh \u00fd ngh\u0129a th\u1ed1ng k\u00ea<\/td>\n<td>X\u00e1c nh\u1eadn k\u1ebft qu\u1ea3 chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch<\/td>\n<\/tr>\n<\/table>\n<p>B\u1ea3ng n\u00e0y n\u00eau b\u1eadt vai tr\u00f2 \u0111\u1ed9c \u0111\u00e1o c\u1ee7a ch\u1ec9 s\u1ed1 n\u00e0y trong vi\u1ec7c chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u cho ph\u00e2n t\u00edch so s\u00e1nh so v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 th\u1ed1ng k\u00ea kh\u00e1c.<\/p>\n<h2>\u01afu \u0111i\u1ec3m &#038; H\u1ea1n ch\u1ebf<\/h2>\n<table>\n<tr>\n<th>\u01afu \u0111i\u1ec3m<\/th>\n<th>H\u1ea1n ch\u1ebf<\/th>\n<\/tr>\n<tr>\n<td>T\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho so s\u00e1nh chu\u1ea9n h\u00f3a<\/td>\n<td>C\u00f3 th\u1ec3 g\u00e2y hi\u1ec3u l\u1ea7m cho c\u00e1c ph\u00e2n ph\u1ed1i kh\u00f4ng chu\u1ea9n<\/td>\n<\/tr>\n<tr>\n<td>H\u1eefu \u00edch \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7<\/td>\n<td>Y\u00eau c\u1ea7u trung b\u00ecnh v\u00e0 \u0111\u1ed9 l\u1ec7ch chu\u1ea9n ch\u00ednh x\u00e1c<\/td>\n<\/tr>\n<tr>\n<td>\u00c1p d\u1ee5ng trong nhi\u1ec1u ph\u00e2n t\u00edch kh\u00e1c nhau<\/td>\n<td>Kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c m\u1eabu nh\u1ecf<\/td>\n<\/tr>\n<\/table>\n    <div class=\"po-container po-container_width_article\">\n        <a href=\"\/en\/quick-start\/\" class=\"po-line-banner po-article-page__line-banner\">\n            <svg class=\"svg-image po-line-banner__logo\" fill=\"currentColor\" width=\"auto\" height=\"auto\"\n                 aria-hidden=\"true\">\n                <use href=\"#svg-img-logo-white\"><\/use>\n            <\/svg>\n            <span class=\"po-line-banner__btn\">B\u1eaft \u0111\u1ea7u Giao d\u1ecbch<\/span>\n        <\/a>\n    <\/div>\n    <\/div>\n"},"faq":[{"question":"Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u00f3ng g\u00f3p nh\u01b0 th\u1ebf n\u00e0o v\u00e0o ph\u00e2n t\u00edch t\u00e0i ch\u00ednh?","answer":"N\u00f3 chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e2n t\u00edch so s\u00e1nh c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u kh\u00e1c nhau tr\u00ean m\u1ed9t thang \u0111o nh\u1ea5t qu\u00e1n. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 r\u1ee7i ro, t\u1ed1i \u01b0u h\u00f3a danh m\u1ee5c \u0111\u1ea7u t\u01b0 v\u00e0 ph\u00e2n t\u00edch xu h\u01b0\u1edbng."},{"question":"\u0110i\u1ec1u g\u00ec ph\u00e2n bi\u1ec7t \u0111i\u1ec3m z v\u1edbi ch\u1ec9 s\u1ed1 n\u00e0y?","answer":"M\u1eb7c d\u00f9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau, nh\u01b0ng z score c\u1ee5 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn gi\u00e1 tr\u1ecb chu\u1ea9n h\u00f3a c\u1ee7a m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u, trong khi thu\u1eadt ng\u1eef r\u1ed9ng h\u01a1n bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng z scores trong c\u00e1c b\u00e0i ki\u1ec3m tra v\u00e0 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea."},{"question":"T\u1ea1i sao \u0111i\u1ec3m z d\u01b0\u01a1ng c\u00f3 gi\u00e1 tr\u1ecb trong giao d\u1ecbch?","answer":"M\u1ed9t \u0111i\u1ec3m z d\u01b0\u01a1ng bi\u1ec3u th\u1ecb r\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a t\u00e0i s\u1ea3n v\u01b0\u1ee3t qu\u00e1 m\u1ee9c trung b\u00ecnh, g\u1ee3i \u00fd hi\u1ec7u su\u1ea5t m\u1ea1nh m\u1ebd ho\u1eb7c t\u00e2m l\u00fd th\u1ecb tr\u01b0\u1eddng t\u00edch c\u1ef1c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 th\u00f4ng b\u00e1o cho c\u00e1c quy\u1ebft \u0111\u1ecbnh giao d\u1ecbch."},{"question":"C\u00e1c bi\u1ec7n ph\u00e1p n\u00e0y c\u00f3 \u00e1p d\u1ee5ng cho c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch nhanh kh\u00f4ng?","answer":"V\u00e2ng, ch\u00fang c\u00f3 l\u1ee3i cho c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch nhanh v\u00ec ch\u00fang cho ph\u00e9p c\u00e1c nh\u00e0 giao d\u1ecbch nhanh ch\u00f3ng \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng v\u00e0 \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0 k\u1ecbp th\u1eddi."},{"question":"Pocket Option c\u1ea3i thi\u1ec7n vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p n\u00e0y nh\u01b0 th\u1ebf n\u00e0o?","answer":"Pocket Option cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 vi\u1ec7c \u00e1p d\u1ee5ng ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, cho ph\u00e9p c\u00e1c nh\u00e0 giao d\u1ecbch d\u1ef1 \u0111o\u00e1n xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 tinh ch\u1ec9nh chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a h\u1ecd."}],"faq_source":{"label":"FAQ","type":"repeater","formatted_value":[{"question":"Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u00f3ng g\u00f3p nh\u01b0 th\u1ebf n\u00e0o v\u00e0o ph\u00e2n t\u00edch t\u00e0i ch\u00ednh?","answer":"N\u00f3 chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e2n t\u00edch so s\u00e1nh c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u kh\u00e1c nhau tr\u00ean m\u1ed9t thang \u0111o nh\u1ea5t qu\u00e1n. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 r\u1ee7i ro, t\u1ed1i \u01b0u h\u00f3a danh m\u1ee5c \u0111\u1ea7u t\u01b0 v\u00e0 ph\u00e2n t\u00edch xu h\u01b0\u1edbng."},{"question":"\u0110i\u1ec1u g\u00ec ph\u00e2n bi\u1ec7t \u0111i\u1ec3m z v\u1edbi ch\u1ec9 s\u1ed1 n\u00e0y?","answer":"M\u1eb7c d\u00f9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau, nh\u01b0ng z score c\u1ee5 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn gi\u00e1 tr\u1ecb chu\u1ea9n h\u00f3a c\u1ee7a m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u, trong khi thu\u1eadt ng\u1eef r\u1ed9ng h\u01a1n bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng z scores trong c\u00e1c b\u00e0i ki\u1ec3m tra v\u00e0 ph\u00e2n t\u00edch th\u1ed1ng k\u00ea."},{"question":"T\u1ea1i sao \u0111i\u1ec3m z d\u01b0\u01a1ng c\u00f3 gi\u00e1 tr\u1ecb trong giao d\u1ecbch?","answer":"M\u1ed9t \u0111i\u1ec3m z d\u01b0\u01a1ng bi\u1ec3u th\u1ecb r\u1eb1ng hi\u1ec7u su\u1ea5t c\u1ee7a t\u00e0i s\u1ea3n v\u01b0\u1ee3t qu\u00e1 m\u1ee9c trung b\u00ecnh, g\u1ee3i \u00fd hi\u1ec7u su\u1ea5t m\u1ea1nh m\u1ebd ho\u1eb7c t\u00e2m l\u00fd th\u1ecb tr\u01b0\u1eddng t\u00edch c\u1ef1c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 th\u00f4ng b\u00e1o cho c\u00e1c quy\u1ebft \u0111\u1ecbnh giao d\u1ecbch."},{"question":"C\u00e1c bi\u1ec7n ph\u00e1p n\u00e0y c\u00f3 \u00e1p d\u1ee5ng cho c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch nhanh kh\u00f4ng?","answer":"V\u00e2ng, ch\u00fang c\u00f3 l\u1ee3i cho c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch nhanh v\u00ec ch\u00fang cho ph\u00e9p c\u00e1c nh\u00e0 giao d\u1ecbch nhanh ch\u00f3ng \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u0111\u1ed9ng th\u1ecb tr\u01b0\u1eddng v\u00e0 \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho c\u00e1c quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0 k\u1ecbp th\u1eddi."},{"question":"Pocket Option c\u1ea3i thi\u1ec7n vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p n\u00e0y nh\u01b0 th\u1ebf n\u00e0o?","answer":"Pocket Option cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 vi\u1ec7c \u00e1p d\u1ee5ng ph\u00e2n t\u00edch th\u1ed1ng k\u00ea, cho ph\u00e9p c\u00e1c nh\u00e0 giao d\u1ecbch d\u1ef1 \u0111o\u00e1n xu h\u01b0\u1edbng th\u1ecb tr\u01b0\u1eddng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 tinh ch\u1ec9nh chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a h\u1ecd."}]}},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.8 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Th\u1ed1ng k\u00ea Z: Hi\u1ec3u t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pocketoption.com\/blog\/vt\/knowledge-base\/learning\/z-statistic\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Th\u1ed1ng k\u00ea Z: Hi\u1ec3u t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong ph\u00e2n t\u00edch t\u00e0i ch\u00ednh\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pocketoption.com\/blog\/vt\/knowledge-base\/learning\/z-statistic\/\" \/>\n<meta property=\"og:site_name\" content=\"Pocket Option 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