你们下礼拜三统计考试的地点改成为原本上课的地点-国际会议听 还有隔壁b01 阶梯教室，不要跑错地方了 还有刚才统计实习课..我上假设检定的那各表的双尾检定时 我原本说拒绝域是X >XL 和X<XL ，你们把它改成 X>X-bar+ Zα/2 *σ/√n 和 X<X-bar-Zα/2*σ/√n 我怕有些人会搞错 除此，有些人要我给他们在多出一些有关固定α和β的例题 1.Suppose we plan to select a random sample from a normal distribution known to have a standard deviation of 8, we know that the population mean is either 42 or 50, and we wish to test H0: μ=42 against H1:μ=50. Determine the sample size n and a critical region such that α=0.05 and β=0.1 Ans:n=9 拒绝域为 x-bar >46.387 --

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