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

Question 18

Multiple Choice

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 ______


A) H0: p1 - p2 c 0; H1: p1 - p2 > 0
B) H0: p1 - p2 c 0; H1: p1 - p2 < 0
C) H0: p1 - p2 = 0; H1: p1 - p2 × 0
D) H0: p1 - p2 < 0; H1: p1 - p2 c 0

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