Question

The probability distribution of a random variable X is given below. x 2 4 8 9...

The probability distribution of a random variable X is given below.

x 2 4 8 9 10
P(X = x) 1⁄26 5⁄26 4⁄13 9⁄26 3⁄26


Given the mean

Find the variance (Var(X)) and the standard deviation, respectively.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

formula for mean is

Mean = 7.576923

formula for variance is

Variance = 5.0902

formula for standard deviation is

Standard deviation = 2.2562

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