Please help with the question labeled Q2. I sent an example of a similar problem as well. I need all 4 parts just like the example as well.

A recent pilot study tested whether walking daily improved systolic blood pressure. For the three subjects in the study, their resting systolic blood pressure was measured at the beginning of the study and again after participating in a walking program for 3 Subject Before After weeks. The table shows the results. 165 125 170 135 W N 145 115 a. Explain why the three "before" observations and the three "after" observations are dependent samples. A. The observations are dependent samples because there are three observations in each group. B. The observations are dependent samples because their values are relatively close to one another. C. The observations are dependent samples because the same subjects are used in the before and after observations. D. The observations are not dependent samples. b. Find the sample mean of the before scores, the sample mean of the after scores, and the sample mean of d = before - after. The sample mean of the before scores is 160 . The sample mean of the after scores is 125 . The sample mean of d is 35 (Round to the nearest integer as needed.) How is the sample mean of the differences related to the before sample mean and the after sample mean? A. The sample mean of the differences is the sum of the sample means of the before and after scores. B. The sample mean of the differences is the average of the sample means of the before and after scores. C. The sample mean of the differences is the difference of the sample means of the before and after scores. O D. They are not related. c. Find a 95% confidence interval for the differences between the population means of subjects before and after going through such a study. ( 22.58 , 47.42 ) (Round to two decimal places as needed.) Interpret the 95% confidence interval. A. It is not unlikely that the before and after systolic blood pressures are equal because the confidence interval does not contain zero. B. It is unlikely that the before and after systolic blood pressures are equal because the confidence interval contains zero. C. It is unlikely that the before and after systolic blood pressures are equal because the confidence interval does not contain zero. D. It is not unlikely that the before and after systolic blood pressures are equal because the confidence interval contains zero. Question is complete. Tap on the red indicators to see incorrect answers. ? All parts showing Similar QuestionAreeent pilot study tested whether walking daily improved systolic blood pressure. For the three subjects in the study, their resting systolic blood pressure was measured at the beginning of the study and again after participating in a walking program for 3 Subject Before After % weeks. The table shows the results. 1 130 140 Z 165 150 S 155 145 a. Explain why the three "before" observations and the three "after' observations are dependent samples. 0 A. The observations are dependent samples because the same subjects are used in the before and aer observations. 0 B. The observations are dependent samples because their values are relatively close to one another. 0 C. The observations are dependent samples because there are three observations in each group. O D. The observations are not dependent samples. Click to select your answer and then click Check Answer. 4 parts . -- ClearAII remaining