Statistics & Probability
Poisson Probability
P(X = k) for rate λ.
Formula
Formula
P = λk e−λk!
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| λ | average rate | computed result | — | result |
| k | occurrences | integer (ℤ) | — | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenλ = 3, k = 2
Result0.2240418077
Example 2
Givenλ = 5, k = 5
Result0.1754673698