Question: A quality control engineer is checking on the variability of nails produced by two machines in the factory. She selects a sample of 12 from

A quality control engineer is checking on the variability of nails produced by two machines in the factory. She selects a sample of 12 from the rst machine and 16 from the second; for the rst sample, the variance is 0.549 cm., while for the second, it is 1.084 cm. What is the Fstatistic? If (1 = .02, the study is twotailed, and the null hypothesis is that there is no difference in variance between the populations, what is the decision? F = 1.97, fail to reject the null hypothesis. F = 1.97, to reject the null hypothesis. F = 0.51, reject the null hypothesis. 7' F = 0.51, fail to reject the null hypothesis

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