問題詳情
66. Claims filed under auto insurance policies follow a normal distribution with mean 19,400 and standard deviation 5,000.
Calculate the probability that the average of 25 randomly selected claims exceeds 20,000.
(A) 0.01
(B) 0.15
(C) 0.27
(D) 0.33
(E) 0.45
參考答案
答案：C
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中