两大样本均数比较的计算公式为()

A . ['https://assets.asklib.com/psource/2015092509023233593.jpg B .https://assets.asklib.com/psource/2015092509023691406.jpg C .https://assets.asklib.com/psource/2015092509024019832.jpg D .https://assets.asklib.com/psource/2015092509024416292.jpg E .https://assets.asklib.com/psource/2015092509024984064.jpg

时间:2022-10-16 06:49:28 所属题库:卫生统计学题库

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