The random variable x represents the number of girls in a family of 3 children. Find the

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The random variable x represents the number of girls in a family of 3 children. Find the mean, variance, and standard deviation for the random variable x. Also, use the range rule of thumb (from Section 2-5) to approximate the minimum and maximum usual values of x.
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Elementary Statistics

ISBN: 9780321225979

3rd Canadian Edition

Authors: Mario F. Triola

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