Question

In 2015 the CDC reported that 15.1% of adults in the United States were smokers. You suspect that the proportion of smokers has decreased since then. You take a random sample of 200 adults and found that 10.3% were smokers. Your null hypothesis is H0: p = 0.151. What is the alternative hypothesis?a. p = 0.151b. p < 0.103c. p > 0.151d. p = 0.103e. p < 0.151

Answer 1

Your alternative hypothesis is a statement that directly contradicts the null hypothesis.

Since H0: p = 0.151 and you expect it to decrease

then Ha: p < 0.151

So your answer is e