[Solution Library] According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones.
Question: According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones. If you select a random sample of 100 fine-dining restaurants,
- what is the probability that the sample has between 15% and 25% that have established policies restricting cell phone use?
- the probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
- the probability is 95% that the sample percentage will be contained within what symmetrical limits of the population percentage?
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