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A state meat inspector in Iowa has been given assignment of determining the mean net weight of packages of ground chuck labeled "3 pounds." Of course, he realizes that the weights can't be precisely 3 pounds. A sample of 36 packages reveals the mean weight to be 3.01 pounds, with the standard deviation of 0.03 pounds.

a. Find out the estimated population mean?

b. Determine the 95 percent confidence interval for population mean.

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