Consider k continuous-type distributions with the following characteristics: pdf f i (x), mean i , and
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Consider k continuous-type distributions with the following characteristics: pdf fi(x), mean μi, and variance σ2i , i = 1, 2, . . . , k. If ci ≥ 0, i = 1, 2, . . . , k, and c1+c2+· · ·+ck = 1, show that the mean and the variance of the distribution having pdf c1f1(x) + · · · + ckfk(x) are μ = Σki=1 ciμi and σ2 = Σki=1 ci[σ2i + (μi − μ)2], respectively.
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Related Book For
Introduction To Mathematical Statistics
ISBN: 9780321794710
7th Edition
Authors: Robert V., Joseph W. McKean, Allen T. Craig
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