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Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these...

Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measured in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in (X1 = 300), and (s1 = 17), and another random sample of 16 gears from the second supplier results in (X2 = 320), and (s2 = 20). You want to test if there is sufficient evidence to conclude that the variance of impact strength is different for the two suppliers? Calculate the test statistic

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