2. Osteoporosis is a condition in which people experience decreased bone mass and an increase in the risk of bone fracture. Actonel is a drug that helps combat osteoporosis in postmenopausal women. In clinical trials, 1374 postmenopausal women were randomly divided into experimental and control groups. The subjects in the experimental group were administered 5 mg of Actonel, while the subjects in the control group were administered a placebo. The number of women who experienced a bone fracture over the course of a year was recorded. Of the 696 women in the experimental group, 2'? experienced a bone fracture during the course of the year. Of the 678 women in the control group, 49 experienced a fracture during the course of the year. (a) Test the claim that a lower proportion of women in the experimental group experienced a bone fracture than the women in the control group at the 1% level of significance. (b) Construct a 95% confidence interval for the difference between the two population proportions. (c) What experimental design is this? What is the treatment? How many levels does it have