Answer Happy

1. A total of 1,286 cell phone users were interviewed in the sample. One of the objectives was to compare male and female cell phone users. For example, 32% of men admitted they sometimes don't drive safely whole talking or texting on a cell phone compared to 25% of women. Also, 71% of men used their cell phone in an emergency compared to 77% of women. Assume that half (643) of the cell phone users in the sample were men and half were women. a. Find a 90% confidence interval for the difference between the proportions of men and women who sometimes do not drive safely while talking or texting on a cell phone. b. Conduct a test to determine whether the proportions of men and women who used their cell phone in an emergency differ. Use a = .10.