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Assume that you have a sample of n 1 equals 9​, with the sample mean Upper...

Assume that you have a sample of n 1 equals 9​, with the sample mean Upper X overbar 1 equals 43​, and a sample standard deviation of Upper S 1 equals 6​, and you have an independent sample of n 2 equals 12 from another population with a sample mean of Upper X overbar 2 equals 35​, and the sample standard deviation Upper S 2 equals 7. Construct a 95​% confidence interval estimate of the population mean difference between mu 1 and mu 2. Assume that the two population variances are equal.

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