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Variance of the sum of two fair coin flips

Source: R/TwoCoinVar.R
TwoCoinVar.Rd

Convolves two Bernoulli(1/2) pmfs and takes the variance of the resulting 0/1/2 distribution: mean 1, variance 1/2.

Usage

TwoCoinVar()

Value

list(variance, mean).

References

Morin, D. J. (2016). Probability: For the Enthusiastic Beginner. Createspace. Eq (3.28).

Examples

TwoCoinVar()$variance
#> [1] 0.5