Exercise 08.02 Algo (Population Mean: Sigma Known) A simple random sample of 60 items from a population with a9 resulted in a sample mean of 31. If required, round your answers to two'decimal places. a. Provide a 90% confidence interval for the population mean. b. Provide a 95% confidence interval for the population mean. c. Provide a 99% confidence interval for the population mean. to Exercise 08.02 Algo (Population Mean: Sigma Known) dy

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