Summary of Discrete Distributions
- Binomial
- n = number of trials
- p = probability of success
- q = probability of failure
- X ~ B(n,p)
- μ = np
- \sigma=\sqrt{npq}
- Geometric
- n = number of trials
- p = probability of success
- X ~ G(p)
- \mu=\frac1p
- \sigma=\sqrt{\frac1p\left(\frac1p-1\right)}
- Poisson
- \mu\:or\:\lambda = mean of interval of interest
- \Sigma=\sqrt{\mu}, (standard deviation)
- X ~ P(μ)