Question: Suppose that you want to perform a hypothesis test to compare the means of two populations using independent simple random samples. Suppose that preliminary data analyses of the samples suggest that the two distributions of the variable under consideration are skewed to the right and that both distributions have the same shape. The sample sizes are small. Should you use the pooled t- test, the nonpooled t- test, the Mann-Whitney test, or none of these tests?

A) Mann- Whitney test

B) nonpooled t- test

C) pooled t- test

D) none of these tests