Let x, and x, be independent random variables with respective means µ = 75 and µ = 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 standard deviation of W. Using the formulas with a = 3 and b = -2.

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Let x, and x2 be independent random variables with
respective means µ = 75 and u= 50, and standard
deviations o, = 16 and o2 = 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
standard deviation of W. Using the formulas with a = 3 and
b = -2.
Transcribed Image Text:Let x, and x2 be independent random variables with respective means µ = 75 and u= 50, and standard deviations o, = 16 and o2 = 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 standard deviation of W. Using the formulas with a = 3 and b = -2.
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