13th Edition
Publisher: CENGAGE L
ISBN: 9781305881884


13th Edition
Publisher: CENGAGE L
ISBN: 9781305881884


Chapter 5.3, Problem 15E
Textbook Problem

The following table provides a probability distribution for the random variable x.

x f (x)
3 .25
6 .50
9 .25
  1. a. Compute E(x), the expected value of x.
  2. b. Compute σ2, the variance of x.
  3. c. Compute σ, the standard deviation of x.

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