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. Calculate the test statistic to use in applying the critical value rule to test the hypotheses.

Answer

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