Question: A dependent random sample from two normally distributed populations gives the following results: n = 15 ; average difference =d= 25.4 ; Sd= 2.8 a)

A dependent random sample from two normally distributed populations gives the following results: n = 15 ; average difference =d= 25.4 ; Sd= 2.8

a) Find the 95% confidence interval for the difference between the means of the two populations.

b) Find the margin of error for a 95% confidence interval for the difference between the means of the two populations.

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