It is useful in some applications to know that about 68% of the area under the standard
Question:
It is useful in some applications to know that about 68% of the area under the standard normal curve lies between -1 and 1.
(a) Verify this statement.
(b) Let X be a normal random variable with expected value μ and variance σ2. Compute Pr (μ - σ ≤ X ≤ μ + σ).
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Related Book For 
Calculus And Its Applications
ISBN: 9780134437774
14th Edition
Authors: Larry Goldstein, David Lay, David Schneider, Nakhle Asmar
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