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    Confidence interval for ratio of 2 population variances

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    A manufacturer needs to compare the weights of a product produced at 2 different plants. A random sample of 16 items from Plant A has a standard deviation of 12 milligrams and a random sample of 25 items from Plant B has a standard deviation of 15 milligrams. Assuming that both populations are normally distributed, construct a 99% confidence interval for the ratio of the 2 population variances.

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    Solution Summary

    This solution constructs a 99% confidence interval for the ratio of 2 population variances provided.

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