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The standard deviation of the ages of a sample of 21 executives from the northern states was 8.4 years; while the standard deviation of the ages of a sample of 30 executives from southern states was 12.8 years. At an alpha level = 0.01, test to see if there is any difference in the standard deviation of the ages of all the northern and southern executives.

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Solution Summary

Step by step method for computing test statistic for F test for comparing two variances is given in the answer.

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