A machine that puts corn flakes into boxes is adjusted to pu

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.)

Solution