A machine that puts corn flakes into boxes is adjusted to put an average of 15.4

Question

A machine that puts corn flakes into boxes is adjusted to put an average of 15.4 ounces into each box, with standard deviation of 0.22 ounce. If a random sample of 15 boxes gave a sample standard deviation of 0.38 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. (Round your answer to two decimal places.)


Find or estimate the P-value of the sample test statistic. (Round your answer to three decimal places.)

Explanation / Answer

A machine that puts corn flakes into boxes is adjusted to put an average of 15.4

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