某中学有高级教师28人,中级教师54人,初级教师81人,为了调查他们

某中学有高级教师28人,中级教师54人,初级教师81人,为了调查他们的身体状况,从他们中抽取容量为36的样本,最适合抽取样本的方法是(    )

A.简单随机抽样

B.系统抽样

C.分层抽样

D.先从高级教师中随机剔除1人,再用分层抽样

答案

思路分析:

依题意,某中学的教师人数,即总体容量为28+54+81=163.因为有中级教师54人,初级教师81人,都为3的倍数,所以采用先从高级教师中随机剔除1人,再用分层抽样的方法.

答案:

D

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