Question

Twenty-four males aged 25 to 29 were selected from the Framingham Heart Study. Twelve were smokers and 12 were non-smokers. The subjects were paired with one being a smoker and the other a non-smoker. Otherwise, each pair was similar with regard to age and physical characteristics. One piece of data that was collected on each of the pairs of subjects was systolic blood pressure readings. The data is shown here:

Smoker Systolic BP	122	146	120	114	124	126	118	128	130	134	116	130
Non-smoker Systolic BP	114	134	114	116	138	110	112	116	132	126	108	116
Smoker BP – Non-smoker BP

You are asked to determine whether the data indicate that the mean systolic blood pressure for smokers is higher than the mean systolic blood pressure for non-smokers. Conduct the appropriate test using a significance level of 0.025. (Assume that the populations are approximately normal.)

30. What are the appropriate hypotheses?

a) H_o: µ_d ≠ 0 H_a: µ_d > 0

b) H_o: µ_d ≠ 0 H_a: µ_d = 0

c) H_o: µ_d = 0 H_a: µ_d > 0

d) H_o: µ_d = 0 H_a: µ_d 0

e) H_o: µ_d = 0 H_a: µ_d < 0

31. State the p-value and the conclusion.

1. p-value = 2.47. The average systolic blood pressure is higher for smokers than for non-smokers.
2. p-value = 2.47. The average systolic blood pressure is not higher for smokers than for non-smokers.
3. p-value =.0154. The average systolic blood pressure is not higher for smokers than for non-smokers.
4. p-value = .0154. The average systolic blood is higher for smokers than for non-smokers.
5. p-value = -1.645 . The average systolic blood pressure is higher for smokers than for non-smokers.

Answer 1