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Variance(Binomial)

Var(X)=np(1-p)
Number of Trials
Success Rate

[Mathematics | Probability | Statistics | Distribution] The variance of a set of numbers is the measure of how spread out they are. A variance of zero indicates that there is no variance which means all of the values are the same. Variance can never be represented with a negative number. The higher the variance the more spread out the values in the data set are.

Variance of a binomial experiment is equal to the amount of trials multiplied by the success rate and failure rate. 

Variables:

n = Number of Trials

p = Success Rate

q = Failure Rate (Calculated as 1 - p)

Equation:

npq