The National Golf Association's consumer advocacy group wishes to compare the variabilities in durability of two brands of golf balls: Champ golf balls and Master golf balls. The advocacy group randomly selects 10 balls of each brand and places each ball into a machine that exerts the force produced by a 250-yard drive. The number of simulated drives needed to crack or chip each ball is recorded, and the results are given in spreadsheet. Assume normal distribution, test to see if the variances in durability differ for the two brands at the .10, .05, and .01 levels of significance. What do you conclude?
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