When a new home-use digital blood pressure monitor is developed it needs to be tested for accuracy. One such test is to have a physician first determine the blood pressure of a randomly sampled group of participants. Then each participant is measured using the home test monitor. If the mean blood pressures are the same for the two measurements the home test monitor is considered to be accurate.

In one such test, 15 people were randomly selected to be in the sample. The blood pressure readings for these people using both methods are in the file BloodPressure.

a. Based on the sample data and a significance level equal to 0.05, what conclusion should the engineers reach regarding the latest blood pressure monitor?

Discuss your answer in a short written statement.

b. Conduct the test as a paired t-test.

c. Discuss whether the two-sample test conducted in part a or the paired-difference test conducted in part b is more appropriate to analyze the data presented in this problem.