An issue of Time Style and Design reported on a poll conducted by Schulman Ronca & Bucuvalas Public Affairs about the shopping habits of wealthy Americans. A total of 603 interviews were conducted among a national sample of adults with household incomes of at least $150,000. Of the adults interviewed, 410 said they had purchased clothing, accessories, or books online in the past year. a. Find a 95% confidence interval for the proportion of all U.S. adults with household incomes of at least $150,000 who purchased clothing, accessories, or books online in the past year. b. Interpret the confidence interval.

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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An issue of Time Style and Design reported on a poll conducted by Schulman Ronca &
Bucuvalas Public Affairs about the shopping habits of wealthy Americans.
A total of 603 interviews were conducted among a national sample of adults with household
incomes of at least $150,000. Of the adults interviewed, 410 said they had purchased clothing,
accessories, or books online in the past year.
a. Find a 95% confidence interval for the proportion of all U.S. adults with household
incomes of at least $150,000 who purchased clothing, accessories, or books online in
the past year.
b. Interpret the confidence interval.

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