{"id":24190,"date":"2023-12-06T11:59:24","date_gmt":"2023-12-06T11:59:24","guid":{"rendered":"https:\/\/masterskills.org\/blog\/tan-so-tuyet-doi-absolute-frequency-trong-thong-ke-la-gi.html"},"modified":"2023-12-22T09:36:40","modified_gmt":"2023-12-22T02:36:40","slug":"tan-so-tuyet-doi-absolute-frequency-trong-thong-ke-la-gi","status":"publish","type":"post","link":"https:\/\/masterskills.org\/blog\/tan-so-tuyet-doi-absolute-frequency-trong-thong-ke-la-gi.html","title":{"rendered":"T\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i (Absolute Frequency) trong th\u1ed1ng k\u00ea l\u00e0 g\u00ec?"},"content":{"rendered":"
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H\u00ecnh minh h\u1ecda. Ngu\u1ed3n: absolutefrequency<\/i><\/p>\n<\/figcaption><\/figure>\n

T\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i<\/span><\/font><\/span><\/h2>\n

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

T\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i<\/span><\/b>\u00a0hay t\u1ea7n su\u1ea5t tuy\u1ec7t \u0111\u1ed1i\u00a0<\/b>trong ti\u1ebfng Anh l\u00e0 Absolute Frequency<\/b>.<\/p>\n

T\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i<\/span><\/b> l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef trong th\u1ed1ng k\u00ea, m\u00f4 t\u1ea3 s\u1ed1 l\u1ea7n \u0111o\u1ea1n d\u1eef li\u1ec7u ho\u1eb7c m\u1ed9t gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 xu\u1ea5t hi\u1ec7n trong m\u1ed9t th\u1eed nghi\u1ec7m ho\u1eb7c t\u1eadp h\u1ee3p c\u00e1c th\u1eed nghi\u1ec7m.<\/p>\n

N\u1ed9i dung<\/font><\/h3>\n

V\u1ec1 c\u01a1 b\u1ea3n, t\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i<\/span> l\u00e0 s\u1ed1 l\u1ea7n m\u1ed9t \u0111i\u1ec1u c\u1ee5 th\u1ec3 n\u00e0o \u0111\u00f3 x\u1ea3y ra. N\u1ebfu m\u1ed7i t\u1ea7n s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed1i (relative frequency) \u0111\u01b0\u1ee3c th\u00eam v\u00e0o cho to\u00e0n b\u1ed9 th\u1eed nghi\u1ec7m, t\u1ed5ng c\u1ed9ng t\u1ea5t c\u1ea3 c\u00e1c t\u1ea7n s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed1i s\u1ebd b\u1eb1ng t\u1ed5ng s\u1ed1 l\u01b0\u1ee3ng d\u1eef li\u1ec7u ho\u1eb7c quan s\u00e1t \u0111\u01b0\u1ee3c thu th\u1eadp trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m.<\/p>\n

V\u00ed d\u1ee5<\/font><\/h3>\n

Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean, t\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i l\u00e0 s\u1ed1 l\u1ea7n m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ea5t \u0111\u1ecbnh xu\u1ea5t hi\u1ec7n trong d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp trong m\u1ed9t th\u1eed nghi\u1ec7m. Ta x\u00e9t th\u1eed nghi\u1ec7m: M\u1ed9t ph\u00f2ng g\u1ed3m 50 k\u1ebf to\u00e1n vi\u00ean, h\u1ecd \u0111\u01b0\u1ee3c h\u1ecfi c\u00f3 bao nhi\u00eau li r\u01b0\u1ee3u h\u1ecd \u0111\u00e3 c\u00f3 trong tu\u1ea7n qua, th\u00ec m\u1ed7i ng\u01b0\u1eddi trong s\u1ed1 50 k\u1ebf to\u00e1n vi\u00ean s\u1ebd \u0111\u01b0a ra c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a h\u1ecd.<\/p>\n

C\u00e1c c\u00e2u tr\u1ea3 l\u1eddi c\u00f3 th\u1ec3 l\u00e0 0, 4, 6, 2, 4, 4, 0, 1, 2, … Trong s\u1ed1 50 quan s\u00e1t, s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 c\u00e2u tr\u1ea3 l\u1eddi “4” nh\u1ea5t \u0111\u1ecbnh, m\u1ed9t s\u1ed1 c\u00e2u tr\u1ea3 l\u1eddi “0” nh\u1ea5t \u0111\u1ecbnh, m\u1ed9t s\u1ed1 c\u00e2u tr\u1ea3 l\u1eddi “6” nh\u1ea5t \u0111\u1ecbnh…<\/p>\n

S\u1ed1 l\u1ea7n k\u1ebf to\u00e1n tr\u1ea3 l\u1eddi “4” s\u1ebd l\u00e0 t\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i<\/span> c\u1ee7a “4.” \u0110\u00f3 l\u00e0 s\u1ed1 l\u1ea7n s\u1ed1 4 xu\u1ea5t hi\u1ec7n trong t\u1eadp d\u1eef li\u1ec7u. S\u1ed1 l\u1ea7n k\u1ebf to\u00e1n tr\u1ea3 l\u1eddi “0” s\u1ebd c\u00f3 t\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i<\/span> l\u00e0 “0.” \u0110\u00f3 l\u00e0 s\u1ed1 l\u1ea7n s\u1ed1 0 xu\u1ea5t hi\u1ec7n trong t\u1eadp d\u1eef li\u1ec7u.<\/p>\n

\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u r\u1eb1ng t\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u01b0\u1eddng xuy\u00ean nh\u01b0 m\u1ed9t th\u01b0\u1edbc \u0111o c\u1ee7a th\u1ed1ng k\u00ea. V\u00ec n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 \u0111i\u1ec3m \u0111\u00e1nh d\u1ea5u “ph\u1ed5 bi\u1ebfn” (“popular” marker), n\u00ean n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 hi\u1ec3n th\u1ecb ph\u1ea7n d\u1eef li\u1ec7u x\u1ea3y ra ph\u1ed5 bi\u1ebfn nh\u1ea5t trong m\u1ed9t th\u1eed nghi\u1ec7m ho\u1eb7c nghi\u00ean c\u1ee9u.<\/p>\n

Tuy nhi\u00ean, c\u00f3 kh\u1ea3 n\u0103ng nhi\u1ec1u th\u01b0\u1edbc \u0111o d\u1eef li\u1ec7u b\u00ean ngo\u00e0i kh\u00e1c c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn n\u00f3. Do \u0111\u00f3, n\u00f3 kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng cu\u1ed1i c\u00f9ng, m\u00e0 l\u00e0 m\u1ed9t ph\u00e9p \u0111o m\u1edf r\u1ed9ng cho m\u1ed9t t\u1eadp h\u1ee3p d\u1eef li\u1ec7u trong m\u1ed9t th\u1eed nghi\u1ec7m.<\/p>\n

(Ngu\u1ed3n tham kh\u1ea3o: Investopedia<\/i>)<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

\n T\u1ea7n s\u1ed1 tuy\u1ec7t \u0111\u1ed1i (ti\u1ebfng Anh: Absolute Frequency) l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef trong th\u1ed1ng k\u00ea, m\u00f4 t\u1ea3 s\u1ed1 l\u1ea7n \u0111o\u1ea1n d\u1eef li\u1ec7u ho\u1eb7c m\u1ed9t gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 xu\u1ea5t hi\u1ec7n trong m\u1ed9t th\u1eed nghi\u1ec7m ho\u1eb7c t\u1eadp h\u1ee3p c\u00e1c th\u1eed nghi\u1ec7m.\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\/24190"}],"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=24190"}],"version-history":[{"count":0,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/posts\/24190\/revisions"}],"wp:attachment":[{"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/media?parent=24190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/categories?post=24190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/masterskills.org\/blog\/wp-json\/wp\/v2\/tags?post=24190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}