問題詳情
2. I take a random sample survey of size n from a population that has mean 80 andstandard deviation20. How big should n be so that the sampling distribution of
has standard deviation 1?
(A)400
(B) 20
(C)Approximately 5
(D)Cannot be determined unless we know the population follows a normaldistribution.
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增