Question: A simple random sample of 60 items from a population with =5 resulted in a sample mean of 31 . (a) Construct a 90 per

A simple random sample of 60 items from a population with

A simple random sample of 60 items from a population with =5 resulted in a sample mean of 31 . (a) Construct a 90 per cent confidence interval for the population mean, . (b) Construct a 95 per cent confidence interval for . (c) Construct a 99 per cent confidence interval for

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