71. 為了確保每個次母全體(sub-population)都有足夠的樣本數,我們應採用下列何種抽樣方法?
(A)簡單隨機抽樣(simple random sampling)
(B)等距抽樣(systematic sampling)
(C)分層抽樣(stratified sampling)
(D)集束抽樣(cluster sampling)

1. 題目解析題目要求確保每個次母全...