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Levels Tought:
University
| Teaching Since: | Apr 2017 |
| Last Sign in: | 438 Weeks Ago, 1 Day Ago |
| Questions Answered: | 9562 |
| Tutorials Posted: | 9559 |
bachelor in business administration
Polytechnic State University Sanluis
Jan-2006 - Nov-2010
CPA
Polytechnic State University
Jan-2012 - Nov-2016
Professor
Harvard Square Academy (HS2)
Mar-2012 - Present
8.62Â Â Â Â Â Â Each year, an insurance company reviews its claim experience in order to set future rates. Regarding their damage-only automobile insurance policies, at least one claim was made on 2073 of the 12,299 policies in effect for the year. Treating these data as a random sample for the population of all possible damage-only policies that could be issued, find a 95% confidence interval for the pop- ulation proportion of at least one claim.
8.63Â Â Â Â Â Â Out of a sample of 94 purchases at the drive- up window of a fast-food establishment, 27 were made with a major credit card.
(a)Â Â Â Estimate the proportion of sales made with a credit card.
(b)Â Â Â Obtain the estimated standard error.
(c)Â Â Â Â Find a 98% confidence interval for the population proportion of purchases paid with a major credit card.
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