問題詳情
33. 在常態分配中，得分在平均數上下二個標準差之間者，約佔總數的多少？
(A)34%
(B)68%
(C)95%
(D)99%
(A)34%
(B)68%
(C)95%
(D)99%
參考答案
答案：C
難度：簡單0.848574
統計：A(18),B(219),C(1726),D(71),E(0)
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