Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a sample of size 640 with a mean of 82.6 and a standard deviation of 18.7. Enter your answer as a...

Assume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a sample of size 640 with a mean of 82.6 and a standard deviation of 18.7. Enter your answer as a tri-linear inequality accurate to 3 decimal places.
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