{"id":24406,"date":"2023-12-06T12:12:04","date_gmt":"2023-12-06T12:12:04","guid":{"rendered":"https:\/\/masterskills.org\/blog\/bo-qua-kich-thuoc-mau-sample-size-neglect-la-gi.html"},"modified":"2023-12-22T09:38:49","modified_gmt":"2023-12-22T02:38:49","slug":"bo-qua-kich-thuoc-mau-sample-size-neglect-la-gi","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/bo-qua-kich-thuoc-mau-sample-size-neglect-la-gi.html","title":{"rendered":"B\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu (Sample Size Neglect) l\u00e0 g\u00ec?"},"content":{"rendered":"
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H\u00ecnh minh h\u1ecda<\/i><\/p>\n<\/figcaption><\/figure>\n

B\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu<\/font><\/h3>\n

Kh\u00e1i ni\u1ec7m<\/b><\/p>\n

B\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu<\/b> trong ti\u1ebfng Anh l\u00e0 Sample Size Neglect.<\/b><\/p>\n

B\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu <\/i> l\u00e0 m\u1ed9t\u00a0\u0111\u1ecbnh ki\u1ebfn\u00a0nh\u1eadn th\u1ee9c n\u1ed5i ti\u1ebfng \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u b\u1edfi Amos Tversky v\u00e0 Daniel Kahneman. B\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu <\/i> x\u1ea3y ra khi ng\u01b0\u1eddi s\u1eed d\u1ee5ng th\u00f4ng tin th\u1ed1ng k\u00ea \u0111\u01b0a ra k\u1ebft lu\u1eadn sai do kh\u00f4ng xem x\u00e9t k\u00edch th\u01b0\u1edbc m\u1eabu c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c quan s\u00e1t.<\/p>\n

Nguy\u00ean nh\u00e2n c\u01a1 b\u1ea3n c\u1ee7a \u0111\u1ecbnh ki\u1ebfn b\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu<\/i> l\u00e0 m\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng kh\u00f4ng hi\u1ec3u r\u1eb1ng c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng x\u1ea3y ra m\u1ee9c \u0111\u1ed9 sai l\u1ec7ch cao trong c\u00e1c m\u1eabu c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf. Do \u0111\u00f3, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i x\u00e1c \u0111\u1ecbnh xem li\u1ec7u k\u00edch th\u01b0\u1edbc m\u1eabu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong = th\u1ed1ng k\u00ea c\u00f3 \u0111\u1ee7 l\u1edbn \u0111\u1ec3 \u0111\u01b0a ra \u0111\u01b0\u1ee3c k\u1ebft lu\u1eadn c\u00f3 \u00fd ngh\u0129a hay kh\u00f4ng.<\/p>\n

Vi\u1ec7c \u0111\u00e1nh gi\u00e1 xem k\u00edch th\u01b0\u1edbc m\u1eabu n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u1ee7 l\u1edbn c\u00f3 th\u1ec3 l\u00e0 th\u00e1ch th\u1ee9c \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi kh\u00f4ng hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea.<\/p>\n

Hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 \u0111\u1ecbnh ki\u1ebfn b\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu<\/font><\/h3>\n

Khi k\u00edch th\u01b0\u1edbc m\u1eabu qu\u00e1 nh\u1ecf th\u00ec kh\u00f4ng th\u1ec3 r\u00fat ra k\u1ebft lu\u1eadn ch\u00ednh x\u00e1c v\u00e0 \u0111\u00e1ng tin c\u1eady. Trong b\u1ed1i c\u1ea3nh t\u00e0i ch\u00ednh, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u00e1nh l\u1eeba c\u00e1c nh\u00e0 \u0111\u1ea7u t\u01b0 theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau.<\/p>\n

Ch\u1eb3ng h\u1ea1n, m\u1ed9t nh\u00e0 \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 th\u1ea5y m\u1ed9t qu\u1ea3ng c\u00e1o c\u1ee7a m\u1ed9t qu\u0129 \u0111\u1ea7u t\u01b0 m\u1edbi, khoe khoang \u0111\u00e3 t\u1ea1o ra l\u1ee3i su\u1ea5t 15% h\u00e0ng n\u0103m k\u1ec3 t\u1eeb khi th\u00e0nh l\u1eadp. Nh\u00e0 \u0111\u1ea7u t\u01b0 c\u00f3 th\u1ec3 nhanh ch\u00f3ng k\u1ebft lu\u1eadn r\u1eb1ng qu\u0129 n\u00e0y l\u00e0 c\u00f4ng c\u1ee5 gi\u00fap h\u1ecd nhanh ch\u00f3ng gi\u00e0u c\u00f3.\u00a0<\/p>\n

Tuy nhi\u00ean, k\u1ebft lu\u1eadn n\u00e0y c\u00f3 th\u1ec3 b\u1ecb nh\u1ea7m l\u1eabn m\u1ed9t c\u00e1ch nguy hi\u1ec3m, n\u1ebfu qu\u0129 n\u00e0y ch\u01b0a ho\u1ea1t \u0111\u1ed9ng l\u00e2u. Trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c nh\u1edd s\u1ef1 b\u1ea5t th\u01b0\u1eddng ng\u1eafn h\u1ea1n, \u00edt li\u00ean quan \u0111\u1ebfn ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ea7u t\u01b0 th\u1ef1c t\u1ebf c\u1ee7a qu\u0129, kh\u00f3 c\u00f3 th\u1ec3 k\u00e9o d\u00e0i.<\/p>\n

V\u00ed d\u1ee5 v\u1ec1 b\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu<\/font><\/h4>\n

M\u1ed9t v\u00ed d\u1ee5 t\u1eeb Amos Tversky v\u00e0 Daniel Kahneman:<\/p>\n

M\u1ed9t ng\u01b0\u1eddi \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u r\u00fat c\u00e1c qu\u1ea3 b\u00f3ng ra t\u1eeb m\u1ed9t m\u1eabu g\u1ed3m 5 qu\u1ea3 b\u00f3ng, v\u00e0 th\u1ea5y r\u1eb1ng c\u00f3 4 qu\u1ea3 m\u00e0u \u0111\u1ecf v\u00e0 m\u1ed9t qu\u1ea3 m\u00e0u xanh l\u00e1 c\u00e2y.<\/p>\n

M\u1ed9t ng\u01b0\u1eddi \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u r\u00fat c\u00e1c qu\u1ea3 b\u00f3ng ra t\u1eeb m\u1ed9t m\u1eabu g\u1ed3m 20 qu\u1ea3 b\u00f3ng v\u00e0 th\u1ea5y r\u1eb1ng c\u00f3 12 qu\u1ea3 m\u00e0u \u0111\u1ecf v\u00e0 8 qu\u1ea3 m\u00e0u xanh l\u00e1 c\u00e2y.<\/p>\n

H\u1ecfi r\u1eb1ng m\u1eabu n\u00e0o cung c\u1ea5p b\u1eb1ng ch\u1ee9ng t\u1ed1t h\u01a1n cho th\u1ea5y c\u00e1c qu\u1ea3 b\u00f3ng ch\u1ee7 y\u1ebfu l\u00e0 m\u00e0u \u0111\u1ecf?<\/p>\n

H\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi cho r\u1eb1ng m\u1eabu \u0111\u1ea7u ti\u00ean (m\u1eabu c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n) cung c\u1ea5p b\u1eb1ng ch\u1ee9ng m\u1ea1nh m\u1ebd h\u01a1n nhi\u1ec1u; v\u00ec t\u1ec9 l\u1ec7 m\u00e0u \u0111\u1ecf so v\u1edbi m\u00e0u xanh l\u00e1 c\u00e2y cao h\u01a1n nhi\u1ec1u so v\u1edbi m\u1eabu th\u1ee9 hai (m\u1eabu c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n).\u00a0<\/p>\n

Tuy nhi\u00ean, trong th\u1ef1c t\u1ebf, t\u1ec9 l\u1ec7 cao trong m\u1eabu \u0111\u1ea7u ti\u00ean c\u00f3 \u00edt \u1ea3nh h\u01b0\u1edfng v\u00ec k\u00edch th\u01b0\u1edbc m\u1eabu nh\u1ecf h\u01a1n. M\u1eabu g\u1ed3m 20 qu\u1ea3 b\u00f3ng th\u1ef1c ch\u1ea5t cung c\u1ea5p b\u1eb1ng ch\u1ee9ng m\u1ea1nh m\u1ebd h\u01a1n nhi\u1ec1u.<\/p>\n

(Tham kh\u1ea3o: Sample Size Neglect, Investopedia)<\/i><\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

\n B\u1ecf qua k\u00edch th\u01b0\u1edbc m\u1eabu (ti\u1ebfng Anh: Sample Size Neglect) l\u00e0 m\u1ed9t \u0111\u1ecbnh ki\u1ebfn nh\u1eadn th\u1ee9c x\u1ea3y ra khi ng\u01b0\u1eddi s\u1eed d\u1ee5ng th\u00f4ng tin th\u1ed1ng k\u00ea \u0111\u01b0a ra k\u1ebft lu\u1eadn sai do kh\u00f4ng xem x\u00e9t k\u00edch th\u01b0\u1edbc m\u1eabu c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c quan s\u00e1t.\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\/24406"}],"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=24406"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/24406\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=24406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=24406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=24406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}