ch5 - Ch u ong 5 KI EM D I . NH GI A THI ET TH ONG K E 1. C...

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Unformatted text preview: Ch u ong 5 KI EM D I . NH GI A THI ET TH ONG K E 1. C AC KH AI NI E . M 1.1 Gia thi et th ong k e Khi nghi en c uu v ` e cac l inh v u . c n`ao do trong th u . c t e ta th u ` ong d ua ra cac nha . n x et khac nhau v ` e cac d oi t u o . ng quan tam. Nh ung nha . n x et nh u va . y th u ` ong d u o . c coi l`a cac gi a thi et , chung co th e dung v`a cung co th e sai. Vi e . c sai di . nh t nh dung sai c ua mo . t gi a thi et d u o . c go . i l`a ki em di . nh . Gia s u c ` an nghi en c uu tham s o cua da . i l u o . ng ng au nhi en X, ng u ` oi ta d ua ra gia thi et c ` an ki em di . nh H : = Go . i H l`a gi a thi et d oi c ua H th` H : 6 = . T ` u m au ng au nhi en W X = ( X 1 ,X 2 ,...,X n ) ta cho . n th ong k e = ( X 1 ,X 2 ,...,X n ) sao cho n eu H dung th` co phan ph oi xac su at ho`an to`an xac di . nh v`a v oi m au cu . th e th` gia tri . cua s e t nh d u o . c. d u o . c go . i l`a ti eu chu an ki em di . nh gia thi et H . V oi b e t`uy y cho tr u oc ( (0 , 01;0 , 05)) ta t` m d u o . c mi ` en W sao cho P ( W ) = . W d u o . c go . i l`a mi ` en bac b o , d u o . c go . i l`a m uc y ngh ia c ua ki em di . nh . Th u . c hi e . n ph ep th u d oi v oi m au ng au nhi en W X = ( X 1 ,X 2 ,...,X n ) ta d u o . c m au cu . th e w x = ( x 1 ,x 2 ,...,x n ). T nh gia tri . c ua ta . i w x = ( x 1 ,x 2 ,...,x n ) ta d u o . c = ( x 1 ,x 2 ,...,x n ) ( d u o . c go . i l`a gi a tri . quan s at ). N eu W th` bac b o gi a thi et H v`a th ` ua nha . n gi a thi et d oi H . N eu / W th` ch ap nha . n gia thi et H . Chu y Co tr u ` ong h o . p gia thi et ki em di . nh v`a gia thi et d oi d u o . c n eu cu . th e h on. Ch ang ha . n: H : ; H : > Khi do ta co ki em di . nh mo ....
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This note was uploaded on 01/18/2012 for the course INFORMATIK 2011 taught by Professor Phanthuongcang during the Winter '11 term at Cornell University (Engineering School).

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ch5 - Ch u ong 5 KI EM D I . NH GI A THI ET TH ONG K E 1. C...

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