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  3. assume that a sample is used to estimate a populat

Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence...

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Statistics

Assume that a sample is used to estimate a population mean μμ.Find the 99.5% confidence interval for a sample of size 642 with amean of 22.2 and a standard deviation of 9.3. Enter your answersaccurate to four decimal places.

Confidence Interval = ( , )

You measure 29 textbooks' weights, and find they have a meanweight of 47 ounces. Assume the population standard deviation is10.8 ounces. Based on this, construct a 99.5% confidence intervalfor the true population mean textbook weight.

Keep 4 decimal places of accuracy in any calculations you do.Report your answers to four decimal places.

Confidence Interval = ( , )

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