Question: Two random samples were selected independently from populations having normal distributions. The statistics given below were extracted from the samples. Complete parts a through c.

Two random samples were selected independently from populations having normal distributions. The statistics given below were extracted from the samples. Complete parts a through c.

x overbar 1 =40.1

x overbar 2=30.5

a. If 1=3

2=2

n 1

n1=40

n2=40

40, construct a 99

99% confidence interval for the difference between the two population means.

The confidence interval is

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