Question: A simple random sample of size 80 has mean x = 7.31. The population standard deviation is = 6.26. Construct a 99% confidence interval

A simple random sample of size 80 has mean x̄ = 7.31. The population standard deviation is σ = 6.26. Construct a 99% confidence interval for the population mean.

In Exercises 1–4, state which type of parameter is to be estimated, then construct the confidence interval.

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