learn.howToCalculate
learn.whatIsHeading
Poisson distribution models the number of events in a fixed interval when events occur independently at a constant average rate. Used for rare event probability.
공식
P(X = k) = (λᵏ × e⁻λ) / k! where λ is the average rate
단계별 가이드
- 1Enter λ (average number of events)
- 2Enter k (number of events of interest)
- 3Calculate using the Poisson formula
풀어진 예시
입력
λ = 3, k = 2
결과
P(X = 2) ≈ 0.224
(3² × e⁻³) / 2! ≈ 0.224
피해야 할 일반적인 실수
- ✕Confusing λ with the event value
- ✕Using Poisson when binomial is more appropriate
계산할 준비가 되셨나요? 무료 Poisson Probability 계산기를 사용해 보세요
직접 시도해 보세요 →