Question

Conduct a hypothesis test to see if the zyban only treatment produces a statistically significant result. Assume the population proportion of success for the placebo treatment is 19%.

Subjects not smoking after 6 months 30 Treatment Placebo Nicotine patch Zyban Zyban and Nicotine patch Subjects Participating 160 244 244 52 85 245 95

1) Choose the the null and alternative hypotheses from the options below:

a) H₀: p = 0.19
H_a: p < 0.19  

or

b) H₀: p = 0.19
H_a: p > 0.19

Answer 1

as we want to check if zyban treatment will make more people leave smoking , therefore correct option is b)

H₀: p = 0.19
H_a: p > 0.19