Do you use the same password for all your social networking sites? A recent survey (USA Today,

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Do you use the same password for all your social networking sites? A recent survey (USA Today, July 22, 2010, p. IB) found that 32% of social network users use the same password for all their social networking sites.
a. To conduct a follow up study that would provide 99% confidence that the point estimate is correct to within ±0.03 of the population proportion, how many people need to be sampled?
b. To conduct a follow up study that would provide 99% confidence that the point estimate is correct to within ±0.05 of the population proportion, how many people need to be sampled?
c. Compare the results of (a) and (b).
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Statistics For Managers Using Microsoft Excel

ISBN: 772

7th Edition

Authors: David M. Levine, David F. Stephan, Kathryn A. Szabat

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