Letd=(ageofhusband)(ageofwife)

d=(ageofhusband)(ageofwife). Assume that the ages are normally distributed for the populations of both husbands and wives in the U.S.

Husband 70, 25, 35, 75, 25, 34, 40, 44

Wife 75, 36. 26. 72. 27. 24. 43. 33

Step 1 of 4:Find the mean of the paired differences,d

d. Round your answer to one decimal place.

Step 2 of 4:Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Step 3 of 4:Find the standard deviation of the paired differences to be used in constructing the confidence interval. Round your answer to one decimal place.

Step 3 of 4:Find the standard deviation of the paired differences to be used in constructing the confidence interval. Round your answer to one decimal place.