3. A clinical trial examined the effectiveness of aspirin in thetreatment of cerebral ischemia(stroke). Patients were randomizedinto treatment and control groups. The study wasdouble-blind. Aftersix months of treatment, the attending physicians evaluatedeachpatient’s progress as either favorable or unfavorable. Of the78 patients in the aspiringroup, 63 had favorable outcomes; 43 ofthe 77 control patients had favorable outcomes.(A) The physiciansconducting the study had concluded from previous researchtheaspirin was likely to increase the chance of a favorableoutcome. Carry out a significancetest to confirm this conclusion.State the hypotheses, find aP-value, and write a summaryof yourresults.(B) Estimate the difference between the favorableproportions in the treatment andcontrol groups. Use 95%confidence.
