【摘 要】
：
Comparing mean treatment effect is one of the most popular methods in statistical literature.If one can have observations directly from treatment and contro
【机 构】
：
Academy of Mathematics and Systems,Chinese Academy of Science Jing Qin Biostatistics Research Branch
【出 处】
：
2009 International Conference on Financial Statistics and Fi
论文部分内容阅读
Comparing mean treatment effect is one of the most popular methods in statistical literature.If one can have observations directly from treatment and control groups,then the simple t-statistic can be used if the underlying distributions are close to normal distributions.On the other hand if the underlying distributions are skewed,then the median deference or the Wilcoxon statistic is preferable.In observational study,however,each individuals choice of treatment is not completely at random.
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