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由两样本均数的差别推断两总体均数的差别, 其差别有统计学意义是指( )

单选题
2021-09-01 16:47
A、两样本均数的差别具有实际意义
B、两总体均数的差别具有实际意义
C、两样本和两总体均数的差别都具有实际意义
D、有理由认为两总体均数有差别
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正确答案
D

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