A simple random sample of size 120 has mean x = 8.45. The population standard deviation is
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A simple random sample of size 120 has mean x̄ = 8.45. The population standard deviation is σ = 4.81. Construct a 99%
confidence interval for the population mean.
In Exercises 5–12, state which type of parameter is to be estimated, then construct the confidence interval.
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