In a recent poll of 702 frequent and occasional flyers found

In a recent poll of 702 frequent and occasional flyers found that 379 respondents favor a ban on cell phones in flight, even if technology permits it. Last year a similar survey showed that half of all flyers supported such a ban. At ? = .05, can you conclude that support for the ban has changed? Which is the best alternate hypothesis for this question?

Solution

Alternative hypothesis: p not equal to 0.5

Because we want to test if support for the ban has changed