In 1965, about 44% of the U.S. adult population had never smoked cigarettes. A national health survey of 1205 U.S. adults (presu
mably selected randomly) during 2006 revealed that 615 had never smoked cigarettes. Reference: Ref 18-5
Suppose you wished to test whether there has been a change since 1965 in the proportion of U.S. adults that have never smoked cigarettes. Which of the following are the appropriate hypotheses?
Select one:
a. H0: p = 0.51, Ha: p ≠ 0.51
b. H0: p = 0.44, Ha: p > 0.44
c. H0: p = 0.44, Ha: p < 0.44
d. H0: p = 0.44, Ha: p ≠ 0.44
