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【单选题】
下列有关细节测试样本量的说法中，错误的是()。A.
总体的变异性与样本规模呈同向变动
B.
当总体被适当分层的情况下确定的样本规模等于总体不分层的情况下确定的样本规模
C.
对于大规模总体，总体的实际规模对样本规模基本没有影响
D.
当误受风险一定时，可容忍错报越低，所需样本规模越大
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