80.承上題,標準偏差(standard deviation)為何?
(A)169
(B)130
(C)120
(D)50
答案:登入後查看
統計: A(30), B(122), C(40), D(11), E(0) #3817115
統計: A(30), B(122), C(40), D(11), E(0) #3817115