Answer
For a mound-shaped, symmetric distribution, the probability that x falls into the interval μ +- 2σ is 0.95
Work Step by Step
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Statistics (12th Edition)
by McClave, James T.; Sincich, Terry T.
Published by
Pearson
ISBN 10:
0321755936
ISBN 13:
978-0-32175-593-3
Chapter 4 - Discrete Random Variables - Exercises 4.34 - 4.49 - Understanding the Principles - Page 193: 4.36
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