{"id":25608,"date":"2023-12-07T01:39:37","date_gmt":"2023-12-07T01:39:37","guid":{"rendered":"https:\/\/masterskills.org\/blog\/phan-phoi-doi-xung-symmetrical-distribution-la-gi-han-che-cua-phan-phoi-doi-xung.html"},"modified":"2023-12-22T10:37:27","modified_gmt":"2023-12-22T03:37:27","slug":"phan-phoi-doi-xung-symmetrical-distribution-la-gi-han-che-cua-phan-phoi-doi-xung","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/phan-phoi-doi-xung-symmetrical-distribution-la-gi-han-che-cua-phan-phoi-doi-xung.html","title":{"rendered":"Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng (Symmetrical Distribution) l\u00e0 g\u00ec? H\u1ea1n ch\u1ebf c\u1ee7a ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng"},"content":{"rendered":"
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Hi\u0300nh minh ho\u0323a. Ngu\u00f4\u0300n: Towardsdatascience.com<\/i><\/p>\n<\/div>\n<\/div>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng<\/font><\/h2>\n

Kha\u0301i ni\u1ec7<\/span>m<\/b><\/p>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng<\/b> trong ti\u00ea\u0301ng Anh la\u0300 Symmetrical Distribution<\/b>.<\/p>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng<\/b> xu\u00e2\u0301t hi\u1ec7<\/span>n khi c\u00e1c gi\u00e1 tr\u1ecb c\u00e1c bi\u1ebfn \u1edf t\u1ea7n s\u1ed1 th\u00f4ng th\u01b0\u1eddng v\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh, trung v\u1ecb v\u00e0 y\u00ea\u0301u vi\u0323 \u0111\u00ea\u0300u n\u0103\u0300m t\u1ea1i c\u00f9ng m\u1ed9t \u0111i\u1ec3m. \u1ede d\u1ea1ng \u0111\u1ed3 th\u1ecb, ph\u00e2n b\u1ed1 \u0111\u1ed1i x\u1ee9ng th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng \u0111\u01b0\u1eddng cong h\u00ecnh chu\u00f4ng.\u00a0<\/p>\n

N\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng \u0111\u01b0\u1ee3c v\u1ebd \u1edf gi\u1eefa bi\u1ec3u \u0111\u1ed3, n\u00f3 s\u1ebd hi\u1ec3n th\u1ecb hai m\u1eb7t ph\u1ea3n chi\u1ebfu l\u1eabn nhau \u0111\u01b0\u01a1\u0323c chia ra. Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i trong giao d\u1ecbch ki\u0303 thu\u1eadt v\u00ec h\u00e0nh \u0111\u1ed9ng gi\u00e1 c\u1ee7a m\u1ed9t t\u00e0i s\u1ea3n \u0111\u01b0\u1ee3c gi\u1ea3 \u0111\u1ecbnh l\u00e0 co\u0301 \u0111\u01b0\u1eddng cong ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng theo th\u1eddi gian.<\/p>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng cho bi\u1ebft \u0111i\u1ec1u g\u00ec?<\/font><\/h3>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng <\/b>\u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi c\u00e1c nha\u0300 giao di\u0323ch \u0111\u1ec3 thi\u1ebft l\u1eadp v\u00f9ng gi\u00e1 cho m\u1ed9t c\u1ed5 phi\u1ebfu, ti\u1ec1n t\u1ec7 ho\u1eb7c h\u00e0ng h\u00f3a tr\u00ean m\u1ed9<\/span>t khung th\u1eddi gian nh\u00e2\u0301t \u0111i\u0323nh. Khung th\u1eddi gian n\u00e0y c\u00f3 th\u1ec3 l\u00e0 trong vo\u0300ng m\u1ed9<\/span>t ng\u00e0y, ch\u1eb3ng h\u1ea1n nh\u01b0 30 ph\u00fat ho\u1eb7c c\u00f3 th\u1ec3 l\u00e0 c\u00e1c phi\u00ean d\u00e0i h\u1ea1n h\u01a1n th\u1eadm ch\u00ed v\u00e0i tu\u1ea7n ho\u1eb7<\/span>c va\u0300i th\u00e1ng.\u00a0<\/p>\n

M\u1ed9t \u0111\u01b0\u1eddng cong h\u00ecnh chu\u00f4ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1ebd xung quanh c\u00e1c \u0111i\u1ec3m gi\u00e1 \u0111\u1ea1t \u0111\u01b0\u1ee3c trong kho\u1ea3ng th\u1eddi gian \u0111\u00f3 v\u00e0 d\u1ef1 ki\u1ebfn r\u1eb1ng h\u1ea7u h\u1ebft c\u00e1c h\u00e0nh \u0111\u1ed9ng gi\u00e1 – kho\u1ea3ng 68% \u0111i\u1ec3m gi\u00e1 – s\u1ebd n\u1eb1m trong m\u1ed9t \u0111\u1ed9 l\u1ec7ch chu\u1ea9n c\u1ee7a t\u00e2m \u0111\u01b0\u1eddng cong. \u0110\u01b0\u1eddng cong \u0111\u01b0\u1ee3c \u0111\u1eb7<\/span>t tr\u00ean tr\u1ee5c y (tru\u0323c gi\u00e1) v\u00ec n\u00f3 l\u00e0 bi\u1ebfn trong khi th\u1eddi gian trong su\u1ed1t giai \u0111o\u1ea1n ch\u1ec9 l\u00e0 tuy\u1ebfn t\u00ednh. V\u00ec v\u1eady, pha\u0323m vi trong m\u1ed9t \u0111\u1ed9 l\u1ec7ch chu\u1ea9n c\u1ee7a gi\u00e1 tr\u1ecb trung b\u00ecnh l\u00e0 pha\u0323m vi gi\u00e1 tr\u1ecb \u01a1\u0309 \u0111\u00f3 gi\u00e1 v\u00e0 gi\u00e1 tr\u1ecb th\u1ef1c c\u1ee7a t\u00e0i s\u1ea3n g\u00e2\u0300n nhau nh\u1ea5t.<\/p>\n

N\u1ebfu h\u00e0nh \u0111\u1ed9ng gi\u00e1 \u0111\u01b0a gi\u00e1 t\u00e0i s\u1ea3n ra kh\u1ecfi pha\u0323m vi tr\u00ean th\u00ec \u0111i\u1ec1u \u0111\u00f3 cho th\u1ea5y gi\u00e1 v\u00e0 gi\u00e1 tr\u1ecb n\u1eb1m ngo\u00e0i khoa\u0309ng b\u0103\u0301t c\u1eb7<\/span>p. N\u1ebfu ca\u0301c \u0111i\u00ea\u0309m vi ph\u1ea1m n\u0103\u0300m \u1edf d\u01b0\u01a1\u0301i \u0111a\u0301y c\u1ee7a \u0111\u01b0\u1eddng cong, t\u00e0i s\u1ea3n \u0111\u01b0\u1ee3c coi l\u00e0 b\u1ecb \u0111\u1ecbnh gi\u00e1 th\u1ea5p. N\u1ebfu n\u00f3 n\u1eb1m tr\u00ean \u0111\u1ec9nh c\u1ee7a \u0111\u01b0\u1eddng cong, t\u00e0i s\u1ea3n s\u1ebd \u0111\u01b0\u1ee3c coi la\u0300 \u0111\u1ecbnh gi\u00e1 qu\u00e1 cao. V\u01a1\u0301i gi\u1ea3 \u0111\u1ecbnh l\u00e0 gia\u0301 t\u00e0i s\u1ea3n s\u1ebd cha\u0323y v\u00ea\u0300 gi\u00e1 tr\u1ecb trung b\u00ecnh theo th\u1eddi gian.<\/p>\n

M\u1ed9t v\u00ed d\u1ee5 v\u1ec1<\/font> ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng<\/font><\/h3>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 hi\u00ea\u0309u ro\u0303 h\u01a1n h\u00e0nh \u0111\u1ed9ng gi\u00e1. H\u00e0nh \u0111\u1ed9ng gi\u00e1 c\u00e0ng ca\u0301ch xa v\u00f9ng m\u1ed9t \u0111\u1ed9 l\u1ec7ch chu\u1ea9n \u0111\u00ea\u0301n gi\u00e1 tr\u1ecb trung b\u00ecnh thi\u0300 x\u00e1c su\u1ea5t m\u00e0 t\u00e0i s\u1ea3n b\u1ecb th\u1ecb tr\u01b0\u1eddng \u0111i\u0323nh gi\u00e1 qua\u0301 th\u1ea5p ho\u1eb7c b\u1ecb \u0111\u1ecbnh gi\u00e1 qu\u00e1 cao ca\u0300ng cao. \u0110i\u00ea\u0300u na\u0300y a\u0301m chi\u0309 r\u0103\u0300ng c\u00e1c giao d\u1ecbch ti\u1ec1m n\u0103ng n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u01b0\u0323a tr\u00ean khoa\u0309ng ca\u0301ch cu\u0309a h\u00e0nh \u0111\u1ed9ng gi\u00e1 \u0111\u00ea\u0301n gi\u00e1 tr\u1ecb trung b\u00ecnh trong kho\u1ea3ng th\u1eddi gian \u0111\u01b0\u01a1\u0323c xem xe\u0301t. Tuy nhi\u00ean, \u1edf quy m\u00f4 th\u1eddi gian l\u1edbn h\u01a1n, nguy c\u01a1 b\u1ecf l\u1ee1 c\u00e1c \u0111i\u1ec3m va\u0300o l\u1ec7<\/span>nh<\/b> va\u0300 xu\u00e2\u0301t l\u1ec7<\/span>nh<\/b> cao h\u01a1n.<\/p>\n

Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng v\u00e0 ph\u00e2n ph\u1ed1i b\u1ea5t \u0111\u1ed1i x\u1ee9ng<\/font><\/h3>\n

Ng\u01b0\u01a1\u0323c la\u0323i v\u01a1\u0301i ph\u00e2n ph\u00f4\u0301i \u0111\u1ed1i x\u1ee9ng<\/b> l\u00e0 ph\u00e2n b\u1ed1 b\u1ea5t \u0111\u1ed1i x\u1ee9ng. M\u1ed9t ph\u00e2n ph\u1ed1i la\u0300 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng n\u1ebfu n\u00f3 kh\u00f4ng co\u0301 \u0111\u1ed9 l\u1ec7ch b\u1eb1ng kh\u00f4ng; hay n\u00f3i c\u00e1ch kh\u00e1c, n\u00f3 kh\u00f4ng b\u1ecb l\u1ec7ch. M\u1ed9t ph\u00e2n ph\u1ed1i kh\u00f4ng \u0111\u1ed1i x\u1ee9ng co\u0301 th\u00ea\u0309 la\u0300 l\u00e0 l\u1ec7ch tr\u00e1i ho\u1eb7c l\u1ec7ch ph\u1ea3i. M\u1ed9t ph\u00e2n ph\u1ed1i l\u1ec7ch tr\u00e1i, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u00e2n ph\u1ed1i \u00e2m, c\u00f3 \u0111u\u00f4i tr\u00e1i d\u00e0i h\u01a1n. Ph\u00e2n ph\u1ed1i l\u1ec7ch ph\u1ea3i hay ph\u00e2n ph\u1ed1i l\u1ec7ch d\u01b0\u01a1ng c\u00f3 \u0111u\u00f4i ph\u1ea3i d\u00e0i h\u01a1n. X\u00e1c \u0111\u1ecbnh xem gi\u00e1 tr\u1ecb trung b\u00ecnh l\u00e0 d\u01b0\u01a1ng hay \u00e2m l\u00e0 b\u01b0\u01a1\u0301c quan tr\u1ecdng trong ph\u00e2n t\u00edch \u0111\u1ed9 l\u1ec7ch c\u1ee7a t\u1eadp d\u1eef li\u1ec7u v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u00e2n t\u00edch ph\u00e2n ph\u1ed1i cu\u0309a t\u00e2\u0323p d\u1eef li\u1ec7u.<\/p>\n

\u0110\u1ed9<\/span> nho\u0323n<\/b> th\u01b0\u1eddng l\u00e0 m\u1ed9t y\u00ea\u0301u t\u00f4\u0301 quan tr\u1ecdng khi ca\u0301c nh\u00e0 giao d\u1ecbch\u00a0ph\u00e2n t\u00edch v\u1ec1 l\u1ee3i nhu\u1eadn \u0111\u1ea7u t\u01b0 ti\u1ec1m n\u0103ng. M\u1ed9t ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng c\u1ee7a l\u1ee3i nhu\u1eadn \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i \u0111\u1ec1u xung quanh gi\u00e1 tr\u1ecb trung b\u00ecnh. M\u1ed9t ph\u00e2n ph\u1ed1i kh\u00f4ng \u0111\u1ed1i x\u1ee9ng v\u1edbi \u0111\u1ed9 l\u1ec7ch ph\u1ea3i d\u01b0\u01a1ng cho th\u1ea5y l\u1ee3i nhu\u1eadn l\u1ecbch s\u1eed l\u1ec7ch kh\u1ecfi gi\u00e1 tr\u1ecb trung b\u00ecnh va\u0300 \u0111\u01b0\u1eddng cong hi\u0300nh chu\u00f4ng l\u1ec7<\/span>ch sang b\u00ean tr\u00e1i. Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t \u0111\u1ed9 l\u1ec7ch \u00e2m cho th\u1ea5y l\u1ee3i nhu\u1eadn l\u1ecbch s\u1eed l\u1ec7ch kh\u1ecfi gi\u00e1 tr\u1ecb trung b\u00ecnh va\u0300 t\u1eadp trung \u1edf ph\u00eda b\u00ean ph\u1ea3i.<\/p>\n

H\u1ea1n ch\u1ebf c\u1ee7a ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng<\/font><\/h3>\n

M\u1ed9t h\u1ea1n ch\u1ebf trong \u0111\u1ea7u t\u01b0 l\u00e0 hi\u1ec7u su\u1ea5t trong qu\u00e1 kh\u1ee9 kh\u00f4ng \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 trong t\u01b0\u01a1ng lai; tuy nhi\u00ean, hi\u1ec7u su\u1ea5t trong qu\u00e1 kh\u1ee9 c\u00f3 th\u1ec3 minh h\u1ecda c\u00e1c ki\u0323ch ba\u0309n v\u00e0 cung c\u1ea5p c\u00e1i nh\u00ecn s\u00e2u s\u1eafc cho c\u00e1c nh\u00e0 giao d\u1ecbch mu\u1ed1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 m\u1ed9t v\u1ecb th\u00ea\u0301<\/b>. Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng l\u00e0 m\u1ed9t qui t\u1eafc chung tu\u0300y nhi\u00ean b\u1ea5t ki\u0300 kho\u1ea3ng th\u1eddi gian na\u0300o ph\u00e2n ph\u00f4\u0301i na\u0300y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cu\u0303ng s\u1ebd c\u00f3 nh\u1eefng kho\u1ea3ng th\u1eddi gian nho\u0309 h\u01a1n co\u0301 ph\u00e2n ph\u1ed1i b\u00e2\u0301t \u0111\u1ed1i x\u1ee9ng.\u00a0<\/p>\n

\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0, m\u1eb7c d\u00f9 \u0111\u01b0\u1eddng cong h\u00ecnh chu\u00f4ng n\u00f3i chung s\u1ebd v\u00ea\u0300 l\u1ea1i \u0111\u1ed1i x\u1ee9ng, c\u00f3 th\u1ec3 c\u00f3 nh\u1eefng kho\u1ea3ng th\u1eddi gian kh\u00f4ng \u0111\u1ed1i x\u1ee9ng ta\u0323i \u0111o\u0301 thi\u1ebft l\u1eadp m\u1ed9t gi\u00e1 tr\u1ecb trung b\u00ecnh m\u1edbi. Hay giao d\u1ecbch ch\u1ec9 d\u1ef1a tr\u00ean v\u00f9ng gi\u00e1 tr\u1ecb c\u1ee7a ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng c\u00f3 th\u1ec3 g\u1eb7p r\u1ee7i ro n\u1ebfu c\u00e1c nha\u0300 giao d\u1ecbch kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn th\u00f4ng tin b\u0103\u0300ng c\u00e1c ch\u1ec9 s\u00f4\u0301 ki\u0303 thu\u1eadt kh\u00e1c.<\/p>\n

Ca\u0301c y\u0301 chi\u0301nh<\/font><\/h3>\n

– Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng<\/b> la\u0300 m\u1ed9t \u0111\u01b0\u1eddng cong h\u00ecnh chu\u00f4ng ho\u1eb7c b\u1ea5t ki\u0300 \u0111\u01b0\u1eddng cong n\u00e0o ma\u0300 khi no\u0301 \u0111\u01b0\u01a1\u0323c n\u01b0\u0309a se\u0303 ta\u0323o ra h\u00ecnh \u1ea3nh ph\u1ea3n chi\u1ebfu.<\/p>\n

– Khi c\u00e1c nh\u00e0 giao d\u1ecbch n\u00f3i v\u1ec1 hi\u1ec7<\/span>n t\u01b0\u01a1\u0323ng tr\u01a1\u0309 v\u00ea\u0300 trung b\u00ecnh,<\/b> h\u1ecd \u0111ang \u0111\u1ec1 c\u1eadp \u0111\u1ebfn s\u1ef1 ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng c\u1ee7a h\u00e0nh \u0111\u1ed9ng gi\u00e1 theo th\u1eddi gian.<\/p>\n

– \u0110\u1ed1i l\u1eadp v\u01a1\u0301i ph\u00e2n ph\u00f4\u0301i \u0111\u1ed1i x\u1ee9ng l\u00e0 ph\u00e2n ph\u1ed1i b\u00e2\u0301t \u0111\u1ed1i x\u1ee9ng, hay l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng cong co\u0301 \u0111\u1ed9 l\u1ec7ch kha\u0301c 0.<\/p>\n

(Theo Investopedia<\/i>)<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

\n Ph\u00e2n ph\u1ed1i \u0111\u1ed1i x\u1ee9ng (ti\u00ea\u0301ng Anh: Symmetrical Distribution) l\u00e0 ph\u00e2n ph\u1ed1i xa\u0301c su\u1ea5t c\u00f3 d\u1ea1ng bi\u1ec3u \u0111\u1ed3 h\u00ecnh chu\u00f4ng va\u0300 khi ke\u0309 m\u00f4\u0323t \u0111\u01b0\u01a1\u0300ng \u01a1\u0309 gi\u01b0\u0303a se\u0303 cho hai n\u1eeda c\u00f3 h\u00ecnh d\u00e1ng nh\u01b0 nhau.\n <\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[414],"tags":[],"_links":{"self":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/25608"}],"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=25608"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/25608\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=25608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=25608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=25608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}