Let X have density fx(x) = 1/3 e-x/3 for 0 < x and fx(x) = 0 otherwise.
Question:
fx(x) = 1/3 e-x/3
for 0 < x
and fx(x) = 0 otherwise.
a. Find the expected value of X2, i.e., E(X2).
b. Find the variance Var(X).
c. Find the standard deviation ox-
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Related Book For 
Introduction to Probability
ISBN: 978-0716771098
1st edition
Authors: Mark Daniel Ward, Ellen Gundlach
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