AT&T would like to test the hypothesis that the proportion of 18- to 34- year- old Americans that own a cell phone is less than the proportion of 35- to 49- year- old Americans. A random sample of 200 18- to 34- year- old Americans found that 126 owned a smartphone. A random sample of 175 35- to 49- year- old Americans found that 119 owned a smartphone. If Population 1 is defined as 18- to 34- year- old Americans and Population 2 is defined as 35- to 49- year- old Americans, the correct hypothesis statement for this hypothesis test would be ______

Question

Quizplus · Accepted Answer

The hypothesis is testing if the proportion of 18- to 34-year-olds with smartphones is less than the proportion of 35- to 49-year-olds. Therefore, the null hypothesis (H0) should state there is no difference (p1 - p2 = 0), and the alternative hypothesis (H1) should state the proportion of the first group is less than the second (p1 - p2 < 0).

AT&T Would Like to Test the Hypothesis That the Proportion