Poisson distribution
where λ is a positive parameter. The mean and variance both equal λ. The Poisson distribution gives the number of occurrences in a certain time period of an event which occurs randomly but at a constant average rate. It can be used as an approximation to the binomial distribution, where n is large and p is small, by taking λ = np.
- RRE form
- RSA
- ruled surface
- ruler and compass construction
- run
- run
- Runge–Kutta methods
- Russell, Bertrand Arthur William
- Russell's paradox
- Rutherford, Lord
- rv
- saddle-point
- sample
- sample space
- sampling distribution
- sandwich theorem
- SAS
- saturated
- scalar
- scalar
- scalar field
- scalar matrix
- scalar multiplication
- scalar product
- scalar quadratic product