An experimenter is concerned that the variability of responses using two different ex- perimental procedures may not

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An experimenter is concerned that the variability of responses using two different ex- perimental procedures may not be the same. Before conducting his research, he con- ducts a prestudy with random samples of 10 and 8 responses and gets s = 7.14 and $23.21, respectively. Do the sample variances present sufficient evidence to indicate that the population variances are unequal?

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