Question: A confidence interval for the difference between the means of two normally distributed populations based on the following dependent samples is desired. Before After 5

A confidence interval for the difference between the means of two normally distributed populations based on the following dependent samples is desired.

Before After

5 7

13 12

6 8

12 14

3 4

Calculate the lower confidence limit of 95 percent confidence interval.

2.45

-3.88

3.88

-2.82

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