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两样本均数差别的假设检验用t检验的条件是()。

多选题
2021-12-29 21:27
A、两总体均数相等
B、两总体方差相等
C、两样本均为大样本
D、两样本均为小样本
E、两总体均符合正态分布
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正确答案
B| D| E

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