Construct the indicated confidence interval for the difference between populatio

Question

Construct the indicated confidence interval for the difference between population proportions Assume that the samples are independent and that they have been randomly selected.

In a random sample of 500 people aged 20-24, 22% were smokers. In a random sample of 450 people aged 14% were smokers. Construct a 95% confidence interval for the difference between the population proportions p1 - p2.



a. 0.048 < p1 - p2 < 0.112

b. 0.025 < p1 - p2 < 0.135

c. 0.032 < p1 - p2 < 0.128

d. 0.035 < p1 - p2 < 0.125

Explanation / Answer

0.032

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