Mean and Variance
If X ~ B(n, p) (that is, X is a binomially distributed random variable), then the expected value of X is
and the variance is
Read more about this topic: Binomial Distribution
Famous quotes containing the word variance:
“There is an untroubled harmony in everything, a full consonance in nature; only in our illusory freedom do we feel at variance with it.”
—Fyodor Tyutchev (1803–1873)