An employee of the U.S. Department of Labor obtains the mean age of men and the mean

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An employee of the U.S. Department of Labor obtains the mean age of men and the mean age of women for each of the 50 states. She then uses those means to construct a confidence interval estimate of the difference between the mean age of men in the United States and the mean age of women in the United States. Why is that procedure not valid?

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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