作者hfairy (Ryan)
站內Statistics
標題[問題] 樣本比例有卡方自由度嗎？
時間Sat Mar 14 18:43:04 2009
Suppose that the proportion p of defective items in a large population
of manufactured items is unknown and test the hypothesis p=0.1 against p≠0.1 ,
Suppose also that in a random sample of 100 items,
it is found that 16 are defective.
(b)the degree of freedom of the chi-square distribution is 2.
(d)the degree of freedom of the chi-square distribution is 1.
最近看到一題考古題(就是上面那題)，講到樣本比例的卡方自由度，
請問樣本比例的卡方自由度怎麼算？ (我以為是99，但感覺好像大錯特錯)
請求大大指教 <(_@_)>
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1F：推 clickhere:d 03/15 00:52
2F：→ clickhere:Under H0, total degree of freedom = 0 03/15 00:53
3F：→ clickhere:Under H1, total degree of freedom is 1 03/15 00:54
4F：→ clickhere:So, chi-square degree of freedom is 1 - 0 = 1 03/15 00:54
5F：→ hfairy:對不起，我想了很久，但不了解為什麼H0的自由度=0，H1=1 03/16 16:09