A random sample of 900 13- to 17-year-olds found that 411 had responded better to a new drug therapy for autism. Let p be the proportion of all teens in this age range who respond better.

9. Suppose you wished to see if the majority of teens in this age range respond better. To do this, you test the following hypotheses at 5% significance level:

H0 : p = 0.50, Ha : p > 0.50 A) greater than 0.10. B) between 0.05 and 0.10. C) between 0.01 and 0.05. D) below 0.01.

Ans: