Question: Find the expected value, the variance, and the standard deviation, when they exist, for each probability density function. f(x) = 20x4 9 20 9x5 if

Find the expected value, the variance, and the standard deviation, when they exist, for each probability density function. f(x) = 20x4 9 20 9x5 if 0 x 1 if x

f(x) = 20x4 9 20 9x5 if 0 x 1 if x > 1

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