14. You are interested in determining whether an experimental birth control pill has the side effect of changing blood pressure. You randomly sample ten women from the city in which you live. You give fi ve of them a placebo for a month and then measure their diastolic blood pressure. Then you switch them to the birth control pill for a month and again measure their blood pressure. The other fi ve women receive the same treatment except they are given the birth control pill fi rst for a month, followed by the placebo for a month. The blood pressure readings are shown here. Note that to safeguard the women from unwanted pregnancy, another means of birth control that does not interact with the pill was used for the duration of the experiment.

a. What is the alternative hypothesis? Assume a nondirectional hypothesis is appropriate.

b. What is the null hypothesis?

c. What do you conclude? Use 0.012 tail. social, biological, health

Diastolic Blood Pressure Birth control Subject No. pill Placebo I 108 102 23 2 76 68 3 69 66 4 78 71 5 74 6 85 76 80 7 79 82 8 78 79 9 80 78 10 81 85