• 2022-05-27
    某地随机测量了101 名30~49岁正常成年男子的血清总胆固醇(mmol/L) ,结果如下:[img=767x105]17b56e7b597ae2e.png[/img]欲估计该样本的抽样误差,根据上表数据,可采用公式
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