When testing hypotheses concerning differences in treatment effects from an experiment, the test statistic used for comparing two treatments is the same as the test statistic used for comparing differences between two population means from a sample study.

Question

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The test statistic used for comparing two treatments in an experiment often involves calculating the difference between the treatment means, which is conceptually similar to comparing differences between two population means from a sample study. In both cases, the test statistic can be based on the difference of means, and the statistical methods (e.g., t-tests) used for hypothesis testing can be the same.

When Testing Hypotheses Concerning Differences in Treatment Effects from an Experiment