Homework Help: statistics

Posted by Jelian on Sunday, November 4, 2012 at 6:06pm.

The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 20 people reveals the mean yearly consumption to be 72 gallons with a standard deviation of 15 gallons. What is the 99% confidence interval for the population mean?

statistics - PsyDAG, Monday, November 5, 2012 at 11:37am
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion of .005 to get Z value.

99% = mean ą 2.575 SD

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