Independent random samples from normal populations produced the results shown below. Sample 1: 5.8, 5.1, 3.9, 4.5, 5.4 Sample 2: 4.4, 6.1, 5.2, 5.7 a. Calculate the pooled estimator of σ2. b. Test μ1

Independent random samples from normal populations produced the results shown below.


Sample 1: 5.8, 5.1, 3.9, 4.5, 5.4
Sample 2: 4.4, 6.1, 5.2, 5.7


a. Calculate the pooled estimator of σ2.
b. Test μ1 < μ2="" using="" α="">
c. Find a 90% confidence interval for (μ1 - μ2).