Question: My question is this: A machine that puts corn flakes into boxes is adjusted to put an average of 15 ounces into each box, with

My question is this:

  1. A machine that puts corn flakes into boxes is adjusted to put an average of 15 ounces into each box, with standard deviation of 0.23 ounce. If a random sample of 15 boxes gave a sample standard deviation of 0.35 ounce, do these data support the claim that the variance has increased and the machine needs to be brought back into adjustment? (Use a 0.01 level of significance.)

Find the sample test statistic.

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