Question

A cereal manufacturer is concerned that the boxes of cereal not be underfilled or overfilled. Each box of cereal is supposed to contain 13 ounces of cereal. A random sample of 31 boxes is tested. The average weight is 12.58 ounces, and the standard deviation is 0.25 ounces. What is the critical value for testing the hypotheses at = .001.

Answer

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