30. Contacts. The campus representative for Lens.com wants to know what percentage of students at a university
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30. Contacts. The campus representative for Lens.com wants to know what percentage of students at a university currently wear contact lens. Suppose the true proportion is 30%.
a) We randomly pick 100 students. Let represent the proportion of students in this sample who wear contacts. What’s the appropriate model for the distribution of ? Specify the name of the distribution, the mean, and the standard deviation.
Be sure to verify that the conditions are met.
b) What’s the approximate probability that more than one third of this sample wear contacts?
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Related Book For
Business Statistics
ISBN: 9780321716095
2nd Edition
Authors: Norean D. Sharpe, Paul F. Velleman, David Bock, Norean Radke Sharpe
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