Calculate variance of probability distribution


Let X be the discrete r.v. with the following probability distribution.

a) Calculate E(X).
b) Calculate µ.
c) Calculate variance of X.
d) Calculate P(X > 5), P(X = 5) P(5 = X = 10).

X P(X)
1 .5
5 .1
10 .3
20 .1

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Basic Statistics: Calculate variance of probability distribution
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