{"id":311749,"date":"2025-07-17T16:53:32","date_gmt":"2025-07-17T16:53:32","guid":{"rendered":"https:\/\/pocketoption.com\/blog\/news-events\/data\/how-to-find-the-variance-2\/"},"modified":"2025-07-17T16:53:32","modified_gmt":"2025-07-17T16:53:32","slug":"how-to-find-the-variance","status":"publish","type":"post","link":"https:\/\/pocketoption.com\/blog\/vt\/knowledge-base\/learning\/how-to-find-the-variance\/","title":{"rendered":"C\u00e1ch T\u00ecm Ph\u01b0\u01a1ng Sai: Ch\u00eca Kh\u00f3a \u0110\u1ec3 Giao D\u1ecbch T\u1ed1t H\u01a1n"},"content":{"rendered":"
<\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":300198,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17],"tags":[],"class_list":["post-311749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learning"],"acf":{"h1":"C\u00e1ch T\u00ecm Ph\u01b0\u01a1ng Sai trong Ph\u00e2n T\u00edch D\u1eef Li\u1ec7u","h1_source":{"label":"H1","type":"text","formatted_value":"C\u00e1ch T\u00ecm Ph\u01b0\u01a1ng Sai trong Ph\u00e2n T\u00edch D\u1eef Li\u1ec7u"},"description":"N\u1eafm v\u1eefng c\u00e1ch t\u00ecm ph\u01b0\u01a1ng sai \u0111\u1ec3 n\u00e2ng cao chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a b\u1ea1n v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh.","description_source":{"label":"Description","type":"textarea","formatted_value":"N\u1eafm v\u1eefng c\u00e1ch t\u00ecm ph\u01b0\u01a1ng sai \u0111\u1ec3 n\u00e2ng cao chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a b\u1ea1n v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh."},"intro":"Trong th\u1ebf gi\u1edbi ph\u00e2n t\u00edch d\u1eef li\u1ec7u, hi\u1ec3u bi\u1ebft v\u1ec1 s\u1ef1 bi\u1ebfn \u0111\u1ed5i l\u00e0 r\u1ea5t quan tr\u1ecdng. Ph\u01b0\u01a1ng sai, m\u1ed9t th\u01b0\u1edbc \u0111o v\u1ec1 m\u1ee9c \u0111\u1ed9 kh\u00e1c bi\u1ec7t c\u1ee7a c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh, cung c\u1ea5p c\u00e1i nh\u00ecn s\u00e2u s\u1eafc v\u1ec1 ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u v\u00e0 \u0111\u00e1nh gi\u00e1 r\u1ee7i ro. Cho d\u00f9 b\u1ea1n \u0111ang ph\u00e2n t\u00edch th\u1ecb tr\u01b0\u1eddng t\u00e0i ch\u00ednh hay d\u1eef li\u1ec7u khoa h\u1ecdc, bi\u1ebft c\u00e1ch t\u00ecm ph\u01b0\u01a1ng sai c\u00f3 th\u1ec3 n\u00e2ng cao qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh c\u1ee7a b\u1ea1n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd kh\u00e1m ph\u00e1 t\u1ea7m quan tr\u1ecdng c\u1ee7a ph\u01b0\u01a1ng sai v\u00e0 h\u01b0\u1edbng d\u1eabn b\u1ea1n qua c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 t\u00ednh to\u00e1n n\u00f3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, n\u00e2ng cao k\u1ef9 n\u0103ng ph\u00e2n t\u00edch v\u00e0 chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a b\u1ea1n tr\u00ean c\u00e1c n\u1ec1n t\u1ea3ng nh\u01b0 Pocket Option.","intro_source":{"label":"Intro","type":"text","formatted_value":"Trong th\u1ebf gi\u1edbi ph\u00e2n t\u00edch d\u1eef li\u1ec7u, hi\u1ec3u bi\u1ebft v\u1ec1 s\u1ef1 bi\u1ebfn \u0111\u1ed5i l\u00e0 r\u1ea5t quan tr\u1ecdng. Ph\u01b0\u01a1ng sai, m\u1ed9t th\u01b0\u1edbc \u0111o v\u1ec1 m\u1ee9c \u0111\u1ed9 kh\u00e1c bi\u1ec7t c\u1ee7a c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh, cung c\u1ea5p c\u00e1i nh\u00ecn s\u00e2u s\u1eafc v\u1ec1 ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u v\u00e0 \u0111\u00e1nh gi\u00e1 r\u1ee7i ro. Cho d\u00f9 b\u1ea1n \u0111ang ph\u00e2n t\u00edch th\u1ecb tr\u01b0\u1eddng t\u00e0i ch\u00ednh hay d\u1eef li\u1ec7u khoa h\u1ecdc, bi\u1ebft c\u00e1ch t\u00ecm ph\u01b0\u01a1ng sai c\u00f3 th\u1ec3 n\u00e2ng cao qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh c\u1ee7a b\u1ea1n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd kh\u00e1m ph\u00e1 t\u1ea7m quan tr\u1ecdng c\u1ee7a ph\u01b0\u01a1ng sai v\u00e0 h\u01b0\u1edbng d\u1eabn b\u1ea1n qua c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 t\u00ednh to\u00e1n n\u00f3 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, n\u00e2ng cao k\u1ef9 n\u0103ng ph\u00e2n t\u00edch v\u00e0 chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch c\u1ee7a b\u1ea1n tr\u00ean c\u00e1c n\u1ec1n t\u1ea3ng nh\u01b0 Pocket Option."},"body_html":"
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Hi\u1ec3u v\u1ec1 Ph\u01b0\u01a1ng sai trong Ph\u00e2n t\u00edch D\u1eef li\u1ec7u<\/h2>\nPh\u01b0\u01a1ng sai l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m th\u1ed1ng k\u00ea \u0111\u1ecbnh l\u01b0\u1ee3ng m\u1ee9c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i ho\u1eb7c ph\u00e2n t\u00e1n trong m\u1ed9t t\u1eadp h\u1ee3p d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 giao d\u1ecbch v\u00e0 nh\u00e0 ph\u00e2n t\u00edch \u0111\u1ec3 hi\u1ec3u ph\u01b0\u01a1ng sai, v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u1ea3n l\u00fd r\u1ee7i ro v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch chi\u1ebfn l\u01b0\u1ee3c.\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a Ph\u01b0\u01a1ng sai trong Giao d\u1ecbch<\/h3>\nTrong giao d\u1ecbch, ph\u01b0\u01a1ng sai gi\u00fap \u0111\u00e1nh gi\u00e1 r\u1ee7i ro li\u00ean quan \u0111\u1ebfn m\u1ed9t t\u00e0i s\u1ea3n c\u1ee5 th\u1ec3. Ph\u01b0\u01a1ng sai cao cho th\u1ea5y l\u1ee3i nhu\u1eadn c\u1ee7a t\u00e0i s\u1ea3n dao \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3, g\u1ee3i \u00fd r\u1ee7i ro cao h\u01a1n, trong khi ph\u01b0\u01a1ng sai th\u1ea5p ng\u1ee5 \u00fd l\u1ee3i nhu\u1eadn \u1ed5n \u0111\u1ecbnh h\u01a1n. C\u00e1c nh\u00e0 giao d\u1ecbch s\u1eed d\u1ee5ng th\u00f4ng tin n\u00e0y \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh, c\u00e2n b\u1eb1ng gi\u1eefa ph\u1ea7n th\u01b0\u1edfng ti\u1ec1m n\u0103ng v\u00e0 r\u1ee7i ro li\u00ean quan.\n

T\u00ednh to\u00e1n Ph\u01b0\u01a1ng sai v\u1edbi Pocket Option<\/h2>\nPocket Option, n\u1ed5i ti\u1ebfng v\u1edbi kh\u1ea3 n\u0103ng giao d\u1ecbch nhanh ch\u00f3ng, cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 t\u00ednh n\u0103ng h\u1ed7 tr\u1ee3 c\u00e1c nh\u00e0 giao d\u1ecbch trong vi\u1ec7c t\u00ednh to\u00e1n v\u00e0 di\u1ec5n gi\u1ea3i ph\u01b0\u01a1ng sai. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 bi\u1ec3u \u0111\u1ed3 ti\u00ean ti\u1ebfn c\u1ee7a n\u00f3, c\u00e1c nh\u00e0 giao d\u1ecbch c\u00f3 th\u1ec3 h\u00ecnh dung ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u v\u00e0 ph\u01b0\u01a1ng sai, h\u1ed7 tr\u1ee3 trong vi\u1ec7c \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c t\u1ed1t h\u01a1n.\n\n[cta_button text=\"B\u1eaft \u0111\u1ea7u Giao d\u1ecbch\"]\n

C\u00f4ng c\u1ee5 c\u1ee7a Pocket Option cho Ph\u00e2n t\u00edch Ph\u01b0\u01a1ng sai<\/h3>\nPocket Option cung c\u1ea5p m\u1ed9t lo\u1ea1t c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch gi\u00fap c\u00e1c nh\u00e0 giao d\u1ecbch \u0111\u00e1nh gi\u00e1 ph\u01b0\u01a1ng sai m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng v\u1ebd d\u1eef li\u1ec7u l\u1ecbch s\u1eed, t\u00ednh to\u00e1n c\u00e1c bi\u1ec7n ph\u00e1p th\u1ed1ng k\u00ea v\u00e0 h\u00ecnh dung xu h\u01b0\u1edbng, gi\u00fap d\u1ec5 d\u00e0ng hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u ch\u1ec9nh chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch cho ph\u00f9 h\u1ee3p.\n\nS\u1ef1 th\u1eadt th\u00fa v\u1ecb: Ph\u01b0\u01a1ng sai l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u b\u1edfi nh\u00e0 th\u1ed1ng k\u00ea n\u1ed5i ti\u1ebfng Ronald Fisher v\u00e0o n\u0103m 1918. K\u1ec3 t\u1eeb \u0111\u00f3, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong th\u1ed1ng k\u00ea v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u01b0 t\u00e0i ch\u00ednh, sinh h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt.\n\n<\/div>","body_html_source":{"label":"Body HTML","type":"wysiwyg","formatted_value":"
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Hi\u1ec3u v\u1ec1 Ph\u01b0\u01a1ng sai trong Ph\u00e2n t\u00edch D\u1eef li\u1ec7u<\/h2>\n

Ph\u01b0\u01a1ng sai l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m th\u1ed1ng k\u00ea \u0111\u1ecbnh l\u01b0\u1ee3ng m\u1ee9c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i ho\u1eb7c ph\u00e2n t\u00e1n trong m\u1ed9t t\u1eadp h\u1ee3p d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 giao d\u1ecbch v\u00e0 nh\u00e0 ph\u00e2n t\u00edch \u0111\u1ec3 hi\u1ec3u ph\u01b0\u01a1ng sai, v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u1ea3n l\u00fd r\u1ee7i ro v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch chi\u1ebfn l\u01b0\u1ee3c.<\/p>\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a Ph\u01b0\u01a1ng sai trong Giao d\u1ecbch<\/h3>\n

Trong giao d\u1ecbch, ph\u01b0\u01a1ng sai gi\u00fap \u0111\u00e1nh gi\u00e1 r\u1ee7i ro li\u00ean quan \u0111\u1ebfn m\u1ed9t t\u00e0i s\u1ea3n c\u1ee5 th\u1ec3. Ph\u01b0\u01a1ng sai cao cho th\u1ea5y l\u1ee3i nhu\u1eadn c\u1ee7a t\u00e0i s\u1ea3n dao \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3, g\u1ee3i \u00fd r\u1ee7i ro cao h\u01a1n, trong khi ph\u01b0\u01a1ng sai th\u1ea5p ng\u1ee5 \u00fd l\u1ee3i nhu\u1eadn \u1ed5n \u0111\u1ecbnh h\u01a1n. C\u00e1c nh\u00e0 giao d\u1ecbch s\u1eed d\u1ee5ng th\u00f4ng tin n\u00e0y \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh th\u00f4ng minh, c\u00e2n b\u1eb1ng gi\u1eefa ph\u1ea7n th\u01b0\u1edfng ti\u1ec1m n\u0103ng v\u00e0 r\u1ee7i ro li\u00ean quan.<\/p>\n

T\u00ednh to\u00e1n Ph\u01b0\u01a1ng sai v\u1edbi Pocket Option<\/h2>\n

Pocket Option, n\u1ed5i ti\u1ebfng v\u1edbi kh\u1ea3 n\u0103ng giao d\u1ecbch nhanh ch\u00f3ng, cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 t\u00ednh n\u0103ng h\u1ed7 tr\u1ee3 c\u00e1c nh\u00e0 giao d\u1ecbch trong vi\u1ec7c t\u00ednh to\u00e1n v\u00e0 di\u1ec5n gi\u1ea3i ph\u01b0\u01a1ng sai. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 bi\u1ec3u \u0111\u1ed3 ti\u00ean ti\u1ebfn c\u1ee7a n\u00f3, c\u00e1c nh\u00e0 giao d\u1ecbch c\u00f3 th\u1ec3 h\u00ecnh dung ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u v\u00e0 ph\u01b0\u01a1ng sai, h\u1ed7 tr\u1ee3 trong vi\u1ec7c \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh chi\u1ebfn l\u01b0\u1ee3c t\u1ed1t h\u01a1n.<\/p>\n

\n \n \n <\/use>\n <\/svg>\n B\u1eaft \u0111\u1ea7u Giao d\u1ecbch<\/span>\n <\/a>\n <\/div>\n \n

C\u00f4ng c\u1ee5 c\u1ee7a Pocket Option cho Ph\u00e2n t\u00edch Ph\u01b0\u01a1ng sai<\/h3>\n

Pocket Option cung c\u1ea5p m\u1ed9t lo\u1ea1t c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch gi\u00fap c\u00e1c nh\u00e0 giao d\u1ecbch \u0111\u00e1nh gi\u00e1 ph\u01b0\u01a1ng sai m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng v\u1ebd d\u1eef li\u1ec7u l\u1ecbch s\u1eed, t\u00ednh to\u00e1n c\u00e1c bi\u1ec7n ph\u00e1p th\u1ed1ng k\u00ea v\u00e0 h\u00ecnh dung xu h\u01b0\u1edbng, gi\u00fap d\u1ec5 d\u00e0ng hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a th\u1ecb tr\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u ch\u1ec9nh chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch cho ph\u00f9 h\u1ee3p.<\/p>\n

S\u1ef1 th\u1eadt th\u00fa v\u1ecb: Ph\u01b0\u01a1ng sai l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u b\u1edfi nh\u00e0 th\u1ed1ng k\u00ea n\u1ed5i ti\u1ebfng Ronald Fisher v\u00e0o n\u0103m 1918. K\u1ec3 t\u1eeb \u0111\u00f3, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong th\u1ed1ng k\u00ea v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u01b0 t\u00e0i ch\u00ednh, sinh h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt.<\/p>\n<\/div>\n"},"faq":[{"question":"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ph\u01b0\u01a1ng sai v\u00e0 \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 g\u00ec?","answer":"Ph\u01b0\u01a1ng sai \u0111o l\u01b0\u1eddng \u0111\u1ed9 ph\u00e2n t\u00e1n c\u1ee7a c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u, trong khi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 c\u0103n b\u1eadc hai c\u1ee7a ph\u01b0\u01a1ng sai, cung c\u1ea5p m\u1ed9t th\u01b0\u1edbc \u0111o \u0111\u1ed9 ph\u00e2n t\u00e1n d\u1ec5 hi\u1ec3u h\u01a1n v\u1edbi c\u00f9ng \u0111\u01a1n v\u1ecb nh\u01b0 d\u1eef li\u1ec7u."},{"question":"S\u1ef1 bi\u1ebfn \u0111\u1ed9ng \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch?","answer":"Ph\u01b0\u01a1ng sai \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch b\u1eb1ng c\u00e1ch ch\u1ec9 ra m\u1ee9c \u0111\u1ed9 r\u1ee7i ro li\u00ean quan. C\u00e1c nh\u00e0 giao d\u1ecbch s\u1eed d\u1ee5ng ph\u01b0\u01a1ng sai \u0111\u1ec3 c\u00e2n b\u1eb1ng l\u1ee3i nhu\u1eadn ti\u1ec1m n\u0103ng v\u1edbi r\u1ee7i ro v\u1ed1n c\u00f3 c\u1ee7a m\u1ed9t t\u00e0i s\u1ea3n."},{"question":"Ph\u01b0\u01a1ng sai c\u00f3 th\u1ec3 \u00e2m kh\u00f4ng?","answer":"Kh\u00f4ng, ph\u01b0\u01a1ng sai kh\u00f4ng th\u1ec3 \u00e2m v\u00ec n\u00f3 \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch b\u00ecnh ph\u01b0\u01a1ng c\u00e1c \u0111\u1ed9 l\u1ec7ch, d\u1eabn \u0111\u1ebfn c\u00e1c gi\u00e1 tr\u1ecb kh\u00f4ng \u00e2m."}],"faq_source":{"label":"FAQ","type":"repeater","formatted_value":[{"question":"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ph\u01b0\u01a1ng sai v\u00e0 \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 g\u00ec?","answer":"Ph\u01b0\u01a1ng sai \u0111o l\u01b0\u1eddng \u0111\u1ed9 ph\u00e2n t\u00e1n c\u1ee7a c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u, trong khi \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 c\u0103n b\u1eadc hai c\u1ee7a ph\u01b0\u01a1ng sai, cung c\u1ea5p m\u1ed9t th\u01b0\u1edbc \u0111o \u0111\u1ed9 ph\u00e2n t\u00e1n d\u1ec5 hi\u1ec3u h\u01a1n v\u1edbi c\u00f9ng \u0111\u01a1n v\u1ecb nh\u01b0 d\u1eef li\u1ec7u."},{"question":"S\u1ef1 bi\u1ebfn \u0111\u1ed9ng \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch?","answer":"Ph\u01b0\u01a1ng sai \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c chi\u1ebfn l\u01b0\u1ee3c giao d\u1ecbch b\u1eb1ng c\u00e1ch ch\u1ec9 ra m\u1ee9c \u0111\u1ed9 r\u1ee7i ro li\u00ean quan. C\u00e1c nh\u00e0 giao d\u1ecbch s\u1eed d\u1ee5ng ph\u01b0\u01a1ng sai \u0111\u1ec3 c\u00e2n b\u1eb1ng l\u1ee3i nhu\u1eadn ti\u1ec1m n\u0103ng v\u1edbi r\u1ee7i ro v\u1ed1n c\u00f3 c\u1ee7a m\u1ed9t t\u00e0i s\u1ea3n."},{"question":"Ph\u01b0\u01a1ng sai c\u00f3 th\u1ec3 \u00e2m kh\u00f4ng?","answer":"Kh\u00f4ng, ph\u01b0\u01a1ng sai kh\u00f4ng th\u1ec3 \u00e2m v\u00ec n\u00f3 \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch b\u00ecnh ph\u01b0\u01a1ng c\u00e1c \u0111\u1ed9 l\u1ec7ch, d\u1eabn \u0111\u1ebfn c\u00e1c gi\u00e1 tr\u1ecb kh\u00f4ng \u00e2m."}]}},"yoast_head":"\nC\u00e1ch T\u00ecm Ph\u01b0\u01a1ng Sai: Ch\u00eca Kh\u00f3a \u0110\u1ec3 Giao D\u1ecbch T\u1ed1t H\u01a1n<\/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\/how-to-find-the-variance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta 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