Use the following information for questions:
A 95% confidence interval for p the proportion of supermarket customers who do not buy house-brand products at all is calculated and turns out to be: (0.18, 0.46).
-The above confidence interval was constructed with a margin of error of 14 percentage points.

Question

Use the following information for questions:
 A 95% confidence interval for p the proportion of supermarket customers who do not buy house-brand products at all is calculated and turns out to be: (0.18, 0.46).
-The above confidence interval was constructed with a margin of error of 14 percentage points.

Quizplus · Accepted Answer

The margin of error is half the width of the confidence interval, so 14 percentage points is half of (0.46 - 0.18) = 0.28.

Use the Following Information for Questions