Find the variance of the given random variable. Let X be the time, in hours, that Christine

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Find the variance of the given random variable.
Let X be the time, in hours, that Christine spends talking on the telephone. Then X has density
fx(x) = 3e-3x,
for 0 < x,
and fx(x) = 0 otherwise.

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Introduction to Probability

ISBN: 978-0716771098

1st edition

Authors: Mark Daniel Ward, Ellen Gundlach

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Question Posted: Mar 14, 2016 06:43 AM

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Find the variance of the given random variable. Let X be the time, in hours, that Christine

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Introduction to Probability

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