The following information was obtained from two independent samples selected

The following information was obtained from two independent samples selected from two normally distributed populations with unknown but equal standard deviations.
The following information was obtained from two independent samples selected

a. Let 1 be the mean of population 1 and 2 be the mean of population 2. What is the point estimate of µ1 €“ µ2?
b. Construct a 98% confidence interval for µ1 €“ µ2.
c. Test at a 1% significance level if µ1 is greater than µ2.

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