Two populations are described in each of the cases that follow. In which cases would it be...

Two populations are described in each of the cases that follow. In which cases would it be appropriate to apply the small-sample t -test to investigate the difference between the population means?

a. Population 1: Normal distribution with variance Population 2: Skewed to the right with variance

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b. Population 1: Normal distribution with variance  Population 2: Normal distribution with variance

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c. Population 1: Skewed to the left with variance s1 2 Population 2: Skewed to the left with variance

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d. Population 1: Normal distribution with variance Population 2: Normal distribution with variance  

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e. Population 1: Uniform distribution with variance Population 2: Uniform distribution with variance