[See Steps] A sample of the reading scores of 25 fifth-graders has a mean of 82, and the standard deviation of the sample is 15. Assume that the population
Question: A sample of the reading scores of 25 fifth-graders has a mean of 82, and the standard deviation of the sample is 15. Assume that the population can be adequately approximated by a normal distribution.
- Find the 95% confidence interval of the mean reading scores of all fifth-graders.
- Find the 85% confidence interval of the mean reading scores of all fifth-graders
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