Let x, and x2 be independent random variables with respective means µ = 75 and Hz = 50, and standard deviations o = 16 and o = 9. 1. Let W = x, - X2. Find the mean, variance, and standard deviation of W. Using the formulas with a =1 and b = –1. 2. Let W= 3x, – 2x2. Find the mean, variance, and

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