Question: Mean, variance, and standard deviation: A random variable X has the following probability distribution. a. Find the mean of X. b. Find the variance of

Mean, variance, and standard deviation: A random variable X has the following probability distribution.x 6 7 89 10 11 P(x) 0.21 0.12 0.29 0.11 0.01

a. Find the mean of X.

b. Find the variance of X.

c. Find the standard deviation of X.

x 6 7 89 10 11 P(x) 0.21 0.12 0.29 0.11 0.01 0.26

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