1. Assume that you have a sample of n1=8, with the sample mean X1=45, and a sample standard deviation of S1=6,

and you have an independent sample of n2=15 from another population with a sample mean of X2=30, and the sample standard deviation S2=7. Construct a 95% confidence interval estimate of the population mean difference between 1

and 2. Assume that the two population variances are equal.

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(Round to two decimal places as needed.)