Suppose that you want to perform a hypothesis test to compare the means of two populations. Several procedures are available, namely, the pooled t-test, the nonpooled t-test, the Mann-Whitney test, the paired t-test, and the Wilcoxon signed-rank test. Before selecting the appropriate procedure, you need to look at the sample data to ascertain distribution type. What methods are available for doing this?

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The Answer of Suppose that you want to perform a hypothesis test to compare the means of two populations. Several procedures are available, namely, the pooled t-test, the nonpooled t-test, the Mann-Whitney test, the paired t-test, and the Wilcoxon signed-rank test. Before selecting the appropriate procedure, you need to look at the sample data to ascertain distribution type. What methods are available for doing this?

Suppose That You Want to Perform a Hypothesis Test to Compare