Confidence interval for proportion
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An airline has surveyed a simple random sample of air travelers to find out whether they would be interested in paying a higher fare in order to have access to e-mail during their flight. Of the 400 travelers surveyed, 80 said email access would be worth a slight extra cost. Construct a 95% confidence interval for the population proportion of air travelers who are in favor of the airline's email idea.
2. Student Monitor reports that 20% of US college students use the Internet for job hunting during the month preceding the survey. Assuming this finding to be based on a simple random sample of 1600 college students, construct and interpret the 90% confidence interval for the population proportion of college students who used the Internet for job hunting during this period.
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Solution Summary
The solution provides step by step method for the calculation of Confidence interval for proportion . Formula for the calculation and Interpretations of the results are also included.
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