Reading Scores A sample of the reading scores of 35

Chapter 7, Problem 11

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Reading Scores A sample of the reading scores of 35 fifth-graders has a mean of 82. The standard deviation of the population is 15. a. Find the best point estimate of the mean. b. Find the 95% confidence interval of the mean reading scores of all fifth-graders. c. Find the 99% confidence interval of the mean reading scores of all fifth-graders. d. Which interval is larger? Explain why.

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