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1. In preparing to do a study on the proportion of people who use internet gambling...

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Basic Math

1. In preparing to do a study on the proportion of people whouse internet gambling sites, you must determine how

many people to survey. If you want to be 99% confident that thepopulation proportion is within 3 percentage

points, how many people must you survey?

2.The National Health and Nutrition Examination Survey reportedthat in a recent year, the mean serum cholesterol

level for U.S. adults was 202, with a standard deviation of 41milligrams per deciliter. A simple random sample of

110 adults is choose, find the probability that the meancholesterol level is greater than 210.

3. In a Gallup poll, 64% of the people polled answered yes tothe following question: “Are you in favor of

the death penalty for a person convicted of murder?” The marginof error in the poll was 3% and the

estimate was made with 90% confidence. At least how

many people were surveyed?

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