15. Conditions. Consider each situation described below. Identify the population and the sample, explain what p and

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15. Conditions. Consider each situation described below.

Identify the population and the sample, explain what p and represent, and tell whether the methods of this chapter can be used to create a confidence interval.

a) Police set up an auto checkpoint at which drivers are stopped and their cars inspected for safety problems. They find that 14 of the 134 cars stopped have at least one safety violation. They want to estimate the proportion of all cars in this area that may be unsafe.

b) A CNN show asks viewers to register their opinions on corporate corruption by logging onto a website. Of the 602 people who voted, 488 thought corporate corruption was

“worse” this year than last year. The show wants to estimate the level of support among the general public.

pN

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Business Statistics

ISBN: 9780321716095

2nd Edition

Authors: Norean D. Sharpe, Paul F. Velleman, David Bock, Norean Radke Sharpe

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