Answer
True
Work Step by Step
The variance of a probability distribution is a measure of the spread of the values of the distribution. The variance is always non-negative, so, the expected value of a random variable must be at least 0.
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter 11 - Probability and Calculus - Chapter Review - Review Exercises - Page 601: 6
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