Binomial variance

The moment identity E(k^2) - (np)^2, cross-checked against npq.

Usage

BinomVar(n, p)

Arguments

n

trials, >= 0.

p

success probability, in [0, 1].

Value

list(variance).

References

Morin, D. J. (2016). Probability: For the Enthusiastic Beginner. Createspace. Eq (4.67).

Examples

BinomVar(10, 0.3)$variance
#> [1] 2.1