A clinical trial is run to assess the efficacy of a new drug to reduce high blood pressure. Patients with a diagnosis of hypertension are recruited to participate in the trial and randomized to receive either the new drug or placebo. Participants take the assigned drug for 12 weeks and their blood pressure status is reorded. At the end of the trail, participants are classified as still having hypertension or not. The data are shown below:

GROUP NUMBER RANDOMIZED NUMBER FREE OF HYPERTENSION AT WEEK 12

placebo 50 6

new drug 50 14

a. what is the prevalence of hypertension at the start of the trial? ______%

b. what is the prevalence of hypertension at the end of the trial? Prevalence 2005 _________

c. Estimate the relative risk comparing the proportions who are free of jypertension at 12 weeks between groups. Relative Risk = ________