作者Nocp (冲浪..被浪冲 傻傻分不清)
看板Grad-ProbAsk
标题[商管] [统计]检定问题
时间Sat Jan 23 22:35:05 2010
Let X be the number of successes in n independent trials with
the probability of success on each trial equal to p .
The null hypothesis H0:p = 0.5 is to be tested against the alternative
hypothesis H1:p > 0.5 .
The null hypothesis is rejected if X = n .For what value of p is
the power function of this test equal to 0.9 ?
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iid
请问一开始 是要先设定 X ~ B ( n . p) ?
再去检定 型2误差 B = 0.1
n x n-x 代数值p=0.5去算 ,由题目发现 x=n n 1
( ) p (1-p) ===================================>0.5 (1-0.5) =0.1
x
解 n 再 来..?!
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