[求助]几个独立样本的中值差异性检验

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<p>请教大家：</p><p>几个独立样本的中值差异性检验在stata中用什么命令？命令格式如何？有没有直接得到两两比较的差异性检验结果的命令？谢谢了</p>

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关键词：差异性检验 差异性 Stata tata 有没有 样本 如何

用 median。

median performs a nonparametric K-sample test on the equality of medians.  It tests the null hypothesis that the K samples were drawn from populations with the same median.  In the case of two samples, the test chi-squared statistic is calculated both with and without a continuity correction.

median varname [if] [in] [weight], by(groupvar) [median_options]

median_options

    * by(groupvar)         grouping variable
      exact                performs Fisher's exact test
      medianties(below)    assign values equal to the median to below group
      medianties(above)    assign values equal to the median to above group
      medianties(drop)     drop values equal to the median from the analysis
      medianties(split)    split values equal to the median equally between the two groups