{"id":29873,"date":"2023-12-07T08:45:26","date_gmt":"2023-12-07T08:45:26","guid":{"rendered":"https:\/\/masterskills.org\/blog\/nua-do-lech-chuan-semi-deviation-la-gi-cong-thuc-tinh-nua-do-lech-chuan.html"},"modified":"2023-12-23T06:10:49","modified_gmt":"2023-12-22T23:10:49","slug":"nua-do-lech-chuan-semi-deviation-la-gi-cong-thuc-tinh-nua-do-lech-chuan","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/nua-do-lech-chuan-semi-deviation-la-gi-cong-thuc-tinh-nua-do-lech-chuan.html","title":{"rendered":"N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n (Semi-Deviation) l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n"},"content":{"rendered":"
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Hi\u0300nh minh ho\u0323a. Ngu\u00f4\u0300n: Investopedia<\/p>\n<\/figcaption><\/figure>\n

N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/font><\/h2>\n

Kha\u0301i ni\u00ea\u0323m<\/b><\/p>\n

N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/b> trong ti\u00ea\u0301ng Anh la\u0300 Semi-Deviation.<\/b><\/p>\n

N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/b> l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng c\u00e1c bi\u1ebfn \u0111\u1ed9ng n\u1eb1m d\u01b0\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh c\u00e1c m\u1ee9c l\u1ee3i su\u1ea5t \u0111\u1ea7u t\u01b0. \u00a0 \u00a0<\/p>\n

N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n cho bi\u1ebft hi\u1ec7u su\u1ea5t \u0111\u1ea7u t\u01b0 d\u1ef1 ki\u1ebfn trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t cho m\u1ed9t kho\u1ea3n \u0111\u1ea7u t\u01b0 r\u1ee7i ro. N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 m\u1ed9t ph\u00e9p \u0111o thay th\u1ebf cho\u00a0\u0111\u1ed9 l\u1ec7ch chu\u1ea9n\u00a0ho\u1eb7c\u00a0ph\u01b0\u01a1ng sai.<\/p>\n

Tuy nhi\u00ean, kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u00f3, n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n ch\u1ec9 nh\u00ecn v\u00e0o c\u00e1c bi\u1ebfn \u0111\u1ed9ng gi\u00e1 ti\u00eau c\u1ef1c. Do \u0111\u00f3, n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 r\u1ee7i ro s\u1ee5t gi\u00e1 c\u1ee7a kho\u1ea3n \u0111\u1ea7u t\u01b0. \u00a0 \u00a0\u00a0<\/p>\n

\u0110\u1eb7c \u0111i\u1ec3m N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n\u00a0<\/font><\/h3>\n

Trong \u0111\u1ea7u t\u01b0, n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/b> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o l\u01b0\u1eddng \u0111\u1ed9 ph\u00e2n t\u00e1n c\u1ee7a gi\u00e1 t\u00e0i s\u1ea3n t\u1eeb gi\u00e1 tr\u1ecb trung b\u00ecnh ho\u1eb7c gi\u00e1 tr\u1ecb m\u1ee5c ti\u00eau \u0111\u00e3 \u0111\u01b0\u1ee3c quan s\u00e1t. Theo ngh\u0129a n\u00e0y, \u0111\u1ed9 ph\u00e2n t\u00e1n c\u00f3 ngh\u0129a l\u00e0 m\u1ee9c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i c\u1ee7a gi\u00e1 t\u1eeb m\u1ee9c gi\u00e1 trung b\u00ecnh. \u00a0\u00a0<\/p>\n

M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c t\u00ednh n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n l\u00e0 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng m\u00e0 r\u1ee7i ro s\u1ee5t gi\u00e1\u00a0c\u1ee7a kho\u1ea3n \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 c\u00f3.<\/p>\n

N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n c\u1ee7a t\u00e0i s\u1ea3n sau \u0111\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi c\u00e1c \u0111i\u1ec3m chu\u1ea9n, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c ch\u1ec9 s\u1ed1 th\u1ecb tr\u01b0\u1eddng, \u0111\u1ec3 xem li\u1ec7u t\u00e0i s\u1ea3n \u0111\u00f3 c\u00f3 r\u1ee7i ro nhi\u1ec1u hay \u00edt h\u01a1n so v\u1edbi c\u00e1c kho\u1ea3n \u0111\u1ea7u t\u01b0 ti\u1ec1m n\u0103ng kh\u00e1c. \u00a0\u00a0<\/p>\n

C\u00f4ng th\u1ee9c t\u00ednh N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/font><\/h3>\n

C\u00f4ng th\u1ee9c t\u00ednh n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/b> l\u00e0: \u00a0\u00a0<\/p>\n

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\n<\/figcaption><\/figure>\n

Trong \u0111\u00f3:\u00a0<\/p>\n

\u00a0– n l\u00e0 t\u1ed5ng s\u1ed1 quan s\u00e1t d\u01b0\u1edbi\u00a0gi\u00e1 tr\u1ecb trung b\u00ecnh.<\/p>\n

\u00a0– rt l\u00e0 gi\u00e1 tr\u1ecb quan s\u00e1t th\u1ee9 t. \u00a0<\/p>\n

– Average l\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh ho\u1eb7c gi\u00e1 tr\u1ecb \u0111\u00edch c\u1ee7a t\u1eadp d\u1eef li\u1ec7u.\u00a0<\/p>\n

To\u00e0n b\u1ed9\u00a0danh m\u1ee5c \u0111\u1ea7u t\u01b0\u00a0c\u1ee7a m\u1ed9t nh\u00e0 \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 theo n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n hi\u1ec7u su\u1ea5t \u0111\u1ea7u t\u01b0 c\u1ee7a to\u00e0n b\u1ed9 t\u00e0i s\u1ea3n c\u00f3 trong n\u00f3.<\/p>\n

T\u00e0i s\u1ea3n sau \u0111\u00f3 cho bi\u1ebft hi\u1ec7u su\u1ea5t trong tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c d\u1ef1 ki\u1ebfn t\u1eeb m\u1ed9t danh m\u1ee5c \u0111\u1ea7u t\u01b0, so v\u1edbi c\u00e1c kho\u1ea3n l\u1ed7 trong m\u1ed9t ch\u1ec9 s\u1ed1 ho\u1eb7c b\u1ea5t c\u1ee9 \u0111i\u1ec3m chu\u1ea9n n\u00e0o \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 so s\u00e1nh.\u00a0<\/p>\n

N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n v\u00e0 N\u1eeda ph\u01b0\u01a1ng sai<\/font><\/h3>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n<\/b> v\u00e0\u00a0n\u1eeda ph\u01b0\u01a1ng sai\u00a0l\u00e0 v\u1edbi n\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n, n l\u00e0 to\u00e0n b\u1ed9 s\u1ed1 quan s\u00e1t trong t\u1eadp d\u1eef li\u1ec7u.<\/p>\n

C\u00f2n v\u1edbi n\u1eeda ph\u01b0\u01a1ng sai, n l\u00e0 t\u1eadp h\u1ee3p con c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c m\u1ee9c l\u1ee3i nhu\u1eadn n\u1eb1m d\u01b0\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh.\u00a0<\/p>\n

Tuy nhi\u00ean, m\u1eb7c d\u00f9 t\u1eadp h\u1ee3p con c\u00e1c m\u1ee9c l\u1ee3i nhu\u1eadn n\u1eb1m d\u01b0\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng b\u1eb1ng to\u00e1n h\u1ecdc \u0111\u1ec3 t\u00ednh n\u1eeda ph\u01b0\u01a1ng sai.\u00a0<\/p>\n

K\u1ebft qu\u1ea3 s\u1ebd kh\u00f4ng c\u00f3 \u00fd ngh\u0129a n\u1ebfu nh\u00e0 \u0111\u1ea7u t\u01b0 s\u1eed d\u1ee5ng t\u1eadp h\u1ee3p n\u00e0y \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t ma tr\u1eadn b\u00e1n hi\u1ec7p ph\u01b0\u01a1ng sai \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a danh m\u1ee5c \u0111\u1ea7u t\u01b0.\u00a0 \u00a0<\/p>\n

(Theo Investopedia)<\/p>\n

\u00a0<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

\n N\u1eeda \u0111\u1ed9 l\u1ec7ch chu\u1ea9n (ti\u1ebfng Anh: Semi-Deviation) l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng c\u00e1c bi\u1ebfn \u0111\u1ed9ng n\u1eb1m d\u01b0\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh c\u00e1c m\u1ee9c l\u1ee3i su\u1ea5t \u0111\u1ea7u t\u01b0.\n <\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[417],"tags":[],"_links":{"self":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/29873"}],"collection":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/comments?post=29873"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/29873\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=29873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=29873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=29873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}