Pooling. In Exercises 25 and 26, assume that the two

Chapter 9, Problem 25

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Pooling. In Exercises 25 and 26, assume that the two samples are independent simplerandom samples selected from normally distributed populations. Also assume that thepopulation standard deviations are equal (s1 = s2), so that the standard error of thedifferences between means is obtained by pooling the sample variances as described inPart 2 of this section. Do Men Have a Higher Mean Body Temperature? Repeat Exercise 9 with theadditional assumption that s1 = s2. How are the results affected by this additionalassumption?

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