Q.1: Find the mean, variance and standard deviation for each of the following a. X Px(x) 2 1/8 3 1/2 11 1/6 b. X Px(x) -5 1/4 -4 1/8 1 1/2 2 1/8
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** The mean is calculated as follows: $$E(X) = \sum_{i=1}^{n} x_i P(x_i)$$ $$E(X) = (2)(1/8) + (3)(1/2) + (11)(1/6)$$ $$E(X) = 1/4 + 3/2 + 11/6$$ $$E(X) = 6/24 + 36/24 + 44/24$$ $$E(X) = 86/24$$ $$E(X) = 43/12$$ Show more…
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