{"id":18888,"date":"2024-05-06T00:49:13","date_gmt":"2024-05-06T00:49:13","guid":{"rendered":"https:\/\/soicau2027.minhngocxoso.com\/?p=18888"},"modified":"2024-05-06T00:49:13","modified_gmt":"2024-05-06T00:49:13","slug":"cach-tinh-xac-suat-lo-de-dua-vao-thuat-toan-tu-chuyen-gia","status":"publish","type":"post","link":"https:\/\/baode3mien.com\/cach-tinh-xac-suat-lo-de-dua-vao-thuat-toan-tu-chuyen-gia\/","title":{"rendered":"C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 d\u1ef1a v\u00e0o thu\u1eadt to\u00e1n t\u1eeb chuy\u00ean gia"},"content":{"rendered":"

C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t tr\u00fang l\u00f4 \u0111\u1ec1: C\u00f4ng th\u1ee9c t\u1eeb m\u1ed9t v\u1ecb th\u1ea7y gi\u1ea5u t\u00ean<\/h1>\n
Xin ch\u00e0o to\u00e0n th\u1ec3 anh em, ch\u1eafc h\u1eb3n \u1edf \u0111\u00e2y c\u0169ng c\u00f3 kh\u00e1 nhi\u1ec1u l\u00f4 th\u1ee7 l\u00fac n\u00e0o c\u0169ng t\u1ef1 \u0111\u1eb7t ra c\u00e2u h\u1ecfi l\u00e0 t\u1ea1i sao ch\u01a1i l\u00f4 \u0111\u1ec1 ho\u00e0i m\u00e0 kh\u00f4ng th\u1eafng? Sao m\u00e0 kh\u00f3 tr\u00fang qu\u00e1 v\u1eady?Nh\u01b0ng n\u1ebfu anh em hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c c\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 <\/strong>\u0111\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c khi \u0111\u00e1nh m\u1ed9t con l\u00f4 hay m\u1ed9t con \u0111\u1ec1 s\u1ebd c\u00f3 kh\u1ea3 n\u0103ng chi\u1ebfn th\u1eafng l\u00e0 bao nhi\u00eau ph\u1ea7n tr\u0103m th\u00ec ch\u1eafc ch\u1eafn r\u1eb1ng anh em s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ea7u t\u01b0 h\u1ee3p l\u00fd v\u00e0 ph\u00f9 h\u1ee3p h\u01a1n \u0111\u1ec3 t\u1eeb \u0111\u00f3 t\u1ef7 l\u1ec7 d\u1ef1 \u0111o\u00e1n tr\u00fang m\u1ed7i ng\u00e0y s\u1ebd \u0111\u01b0\u1ee3c n\u00e2ng cao l\u00ean m\u1ed9t m\u1ee9c \u0111\u00e1ng k\u1ec3.<\/p>\n

<\/span>C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 l\u00e0 g\u00ec?<\/h2>\n

X\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1<\/strong> l\u00e0 t\u1ed5ng h\u1ee3p t\u1ea5t c\u1ea3 nh\u1eefng c\u00f4ng th\u1ee9c, thu\u1eadt to\u00e1n t\u1eeb chuy\u00ean gia \u0111\u1ec3 gi\u00fap ng\u01b0\u1eddi ch\u01a1i d\u1ec5 d\u00e0ng nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 chi\u1ebfn th\u1eafng khi tham gia c\u00e1 c\u01b0\u1ee3c l\u00f4 \u0111\u1ec1 \u1edf t\u1eebng h\u00ecnh th\u1ee9c c\u1ee5 th\u1ec3 l\u00e0 bao nhi\u00eau ph\u1ea7n tr\u0103m<\/p>\n

Vi\u1ec7c bi\u1ebft tr\u01b0\u1edbc \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 th\u1eafng c\u1ee7a m\u1ed9t tr\u00f2 ch\u01a1i c\u00e1 c\u01b0\u1ee3c s\u1ebd gi\u00fap anh em d\u1ec5 d\u00e0ng h\u01a1n trong vi\u1ec7c l\u1ef1a ch\u1ecdn chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ec3 \u0111\u1ea7u t\u01b0 trong ng\u00e0y h\u00f4m nay, t\u1eeb \u0111\u00f3 kh\u1ea3 n\u0103ng v\u00e0o b\u1edd m\u1ed7i ng\u00e0y c\u1ee7a anh em s\u1ebd \u0111\u01b0\u1ee3c n\u00e2ng cao l\u00ean \u1edf m\u1ed9t m\u1ee9c \u0111\u00e1ng k\u1ec3.<\/p>\n

<\/span>C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 d\u1ef1a v\u00e0o thu\u1eadt to\u00e1n t\u1eeb chuy\u00ean gia<\/h2>\n

C\u01a1 b\u1ea3n s\u1ed1 \u0111\u00f4ng v\u1eabn ngh\u0129 r\u1eb1ng nh\u1eefng gi\u1ea3i th\u01b0\u1edfng c\u1ee7a l\u00f4 \u0111\u1ec1 ch\u1ec9 mang t\u00ednh ch\u1ea5t may r\u1ee7i nh\u01b0ng \u0111\u1ed1i v\u1edbi c\u00e1c l\u00f4 th\u1ee7 \u0111\u00e3 c\u00f3 kinh nghi\u1ec7m nhi\u1ec1u n\u0103m chinh chi\u1ebfn v\u1edbi nh\u1eefng con s\u1ed1 th\u00ec kh\u00f4ng ph\u1ea3i nh\u01b0 v\u1eady. T\u1ea5t c\u1ea3 trong s\u1ed1 h\u1ecd \u0111\u1ec1u c\u00f3 s\u1ef1 t\u00ednh to\u00e1n, ph\u00e2n t\u00edch k\u1ef9 l\u01b0\u1ee1ng \u0111\u1ec3 ch\u1ecdn ra m\u1ed9t con l\u00f4 c\u00f3 t\u1ef7 l\u1ec7 tr\u00fang cao nh\u1ea5t.<\/p>\n

V\u1eady n\u00ean, vi\u1ec7c n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c v\u1ec1 c\u00e1ch t\u00ednh x\u00e1c su\u1ea5t l\u00f4 \u0111\u1ec1 theo to\u00e1n h\u1ecdc<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng \u0111i\u1ec1u v\u00f4 c\u00f9ng quan tr\u1ecdng m\u00e0 m\u1ed9t l\u00f4 th\u1ee7 c\u1ea7n ph\u1ea3i hi\u1ec3u r\u00f5.<\/p>\n

<\/span>a) X\u00e1c su\u1ea5t tr\u00fang l\u00f4 t\u00f4<\/h3>\n

X\u00e1c su\u1ea5t tr\u00fang l\u00f4 = [1 \u2013 [(100 \u2013 a)% ^ 27)] x 10 <\/strong>(a l\u00e0 s\u1ed1 l\u01b0\u1ee3ng l\u00f4 anh em \u0111\u00e1nh, ^ l\u00e0 s\u1ed1 m\u0169 t\u1ee9c anh em s\u1ebd nh\u00e2n l\u00ean v\u1edbi con s\u1ed1 \u0111\u00f3 27 l\u1ea7n).<\/p>\n

=> N\u1ebfu anh em \u0111\u00e1nh 1 con l\u00f4 th\u00ec ph\u1ea7n tr\u0103m th\u1eafng s\u1ebd l\u00e0: [1 \u2013 (100 \u2013 1)% ^ 27] x 10 = 23,7%.<\/p>\n

=> Theo c\u00f4ng th\u1ee9c tr\u00ean th\u00ec anh em suy ra n\u1ebfu \u0111\u00e1nh 2 con l\u00f4 c\u00f9ng l\u00fac s\u1ebd c\u00f3 c\u01a1 h\u1ed9i th\u1eafng l\u00e0 42%, 3 con l\u00e0 56% v\u00e0 4 con s\u1ebd l\u00e0 67%.<\/p>\n

\"\"<\/p>\n

<\/span>b) X\u00e1c su\u1ea5t tr\u00fang l\u00f4 \u0111\u1ec1<\/h3>\n

C\u0169ng kh\u00e1 \u0111\u01a1n gi\u1ea3n, anh em c\u1ea7n ch\u1ecdn 1 con s\u1ed1 c\u00f3 2 ch\u1eef s\u1ed1 t\u1eeb 00 \u2013 99, v\u1eady th\u00ec trong 100 b\u1ed9 s\u1ed1 n\u00e0y th\u00ec anh em c\u1ea7n d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c tr\u00fang 1 con s\u1ed1 => Kh\u1ea3 n\u0103ng th\u1eafng s\u1ebd l\u00e0 1% n\u1ebfu anh em ch\u1ecdn ch\u01a1i theo b\u1ea1ch th\u1ee7 l\u00f4<\/strong>.<\/p>\n

V\u1edbi s\u1ed1 ti\u1ec1n th\u01b0\u1edfng kh\u00e1 cao l\u00e0 1 \u0103n 99 \u0111\u1ed1i v\u1edbi nh\u1eefng nh\u00e0 c\u00e1i online th\u00ec ng\u00e0y nay c\u00e1c l\u00f4 th\u1ee7 th\u01b0\u1eddng l\u1ef1a ch\u1ecdn c\u00e1ch \u0111\u00e1nh d\u00e0n \u0111\u1ec1 \u0111\u1ec3 t\u0103ng c\u01a1 h\u1ed9i chi\u1ebfn th\u1eafng cho m\u00ecnh.<\/p>\n

N\u1ebfu \u0111\u00e1nh song th\u1ee7 l\u00f4 l\u00e0 g\u00ec<\/strong> (\u0111\u00e1nh 2 con) => Ph\u1ea7n tr\u0103m th\u1eafng s\u1ebd l\u00e0 2%.<\/p>\n

T\u01b0\u01a1ng t\u1ef1 n\u1ebfu ch\u01a1i d\u00e0n 10 con s\u1ebd l\u00e0 10%, d\u00e0n 36 con s\u1ebd l\u00e0 36%.<\/p>\n

<\/span>c) C\u00e1ch t\u00ednh x\u00e1c su\u1ea5t tr\u00fang l\u00f4 xi\u00ean<\/h3>\n

Ph\u1ea7n tr\u0103m h\u1ed1t b\u1ea1c t\u1eeb xi\u00ean 2 v\u00e0 xi\u00ean 3 nh\u01b0 sau:<\/p>\n