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1) Let X and Y be independent random variables with X = 2, X = 2, Y = 2, and Y = 3. Find the

1) Let X and Y be independent random variables with μX = 2, σX = 2, μY = 2, and σY = 3. Find the mean and variance of 3X.

The mean of 3X is

The variance of 3X is

2)

Let and be independent random variables with μX = 2, σX = 2, μY = 2, and σY = 3. Find the mean and variance of X + Y.

The mean of X + Y is

The variance of X + Y is

3)

Let and be independent random variables with μX = 2, σX = 2, μY = 2, and σY = 3. Find the mean and variance of X – Y.

The mean of X - Y is

The variance of X - Y is

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