For each of the densities below, indicate whether the mean and variance of the associated random variable
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For each of the densities below, indicate whether the mean and variance of the associated random variable exist. In addition, find the median and mode, and indicate whether or not each density is symmetric.
(a) \(f(x)=3 x^{2} I_{[0,1]}|x|\)
(b) \(f(x)=2 x^{-3} I_{[1, \infty)}(x)\)
(c) \(f(x)=\left[\pi\left(1+x^{2}ight)ight]^{-1} I_{(-\infty, \infty)}(x)\)
(d) \(f(x)=\left(\begin{array}{l}4 \\ x\end{array}ight)(.2)^{x}(.8)^{4-x} I_{(0,1,2,3,4)}(x)\)
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Related Book For
Mathematical Statistics For Economics And Business
ISBN: 9781461450221
2nd Edition
Authors: Ron C.Mittelhammer
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