7. A clinical researcher wants to determine whether a new drug, RU-487, is more effective than RU-486. Suppose that 100 women are assigned the treatment group (given RU-487) and 100 women are assigned to the control group (RU-486). In the treatment group, three people became pregnant. In the control group, nine people became pregnant. Is there sufficient evidence (at a 0.05) to conclude that RU-487 is more effective at preventing pregnancy than RU-486? Hint - Let p be the probability that a pregnancy comes from the treatment group. H : p = 0.5 and H : p < 0.5. = Yes, since the p-value under Ho of no difference is approximately equal to 0.033, which is less than a = 0.05 No, since the p-value under H is approximately equal to 0.073, which is greater than a = 0.05 No, since the p-value under Hoof no difference is approximately equal to 0.134, which is greater than a = 0.05 Yes, since the p-value under Hoof no difference is approximately equal to 0.048, which is less than a = 0.05