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A butcher uses a machine that packages ground beef in one-pound (lbf) portions. A sample of...

A butcher uses a machine that packages ground beef in one-pound (lbf) portions. A sample of 56 packages of ground beef packaged by this machine has a sample standard deviation of 0.2 lbf. Construct a 90% confidence interval for the true standard deviation of the weights of all packages prepared by the machine.

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The solution is done showing all steps wiith caculations and required formulas. Hope you can undertsand

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