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The U.S dairy wants to estimate the mean yearly milk consumption. A sample of 9 people...

The U.S dairy wants to estimate the mean yearly milk consumption. A sample of 9 people reveal the mean yearly consumption to be 50 gallons with a standard deviation 15 gallons. Develop a 99% confidence interval for the population mean. Is it reasonable for the population mean to be 70 gallons?

Math   Statistics-And-Probability   
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Cut off points here are calculated from normal didistribution probability table.

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