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A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x=120.2 and the sample standard deviation

A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x=120.2 and the sample standard deviation is found to be s=12.9. Construct a99% confidence interval for the population mean.

The lower bound is

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