题目内容

下列说法不正确的有（）。

A. 样本量越大，样本均值的抽样标准差就越小
B. 样本量越大，样本均值的抽样标准差就越大
C. 样本量越小，样本均值的抽样标准差就越小
D. 样本均值的抽样标准差与样本量无关

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抽样成数的特点是样本成数越大，抽样平均误差越大。（）

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