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Consider the following data from two independent samples with equal population variances. Construct a 90% confidence...

Consider the following data from two independent samples with equal population variances. Construct a 90% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed.

x1 = 37.1 x2 = 32.2
s1 = 8.9 s2 = 9.1
n1 = 15 n2 = 16
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Solution: Here concept of confidence interval for difference in population means is used.

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