A researcher wants to find the effect of a special diet on s

A researcher wants to find the effect of a special diet on systolic blood pressue. She selected a sample of 7 adults and put them on this dietary plan for three months. The following table gives the systolic blood pressures of these seven adults before and after the completion of this plan.

Assume the standard deviation of the sample is equal to 10.786

A) Using an appropriate significance level, test the research hypothesis that this special diet reduces systolic blood pressure.

B) Construct a 95% confidence interval for d of the population paired differences before and after the special diet.

C) Compare conclusions from parts A and B and make comments on them.

PLEASE SOLVE AS A HAND PROBLEM, SHOWING ALL FORMULAS AND WORK.

Solution