Question:

Millions of Americans arrange travel plans on the WEB. A recent survey reported that 77% purchase plane tickets on the Web. Suppose the survey was based on 1,000 respondents:

1. Construct a 95% Confidence Interval estimate for the population proportion of Americans who purchase plane tickets on the Web.
2. Construct a 90% Confidence Interval estimate for the population proportion of Americans who purchase plane tickets on the Web.

For this problem the book gives a- 0.74≤≤0.80 and b- 0.75≤≤0.79

But all of these have to be worked out using Confidence Interval Format and Sampling Error Format for each.

Thanks

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Solution: The downloadable solution consists of 2 pages
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