Question: Suppose that the variable under consideration is normally distributed on each of the two populations and that you are going to use independent simple random

Suppose that the variable under consideration is normally distributed on each of the two populations and that you are going to use independent simple random samples to compare the population means. Fill in the blank and explain your answer: Unless you are quite sure that the are equal, the nonpooled t-procedures should be used instead of the pooled t-procedures.

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