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.
Formule
P(X = k) = (λᵏ × e⁻λ) / k! where λ is the average rate
Stapsgewijze handleiding
- 1Enter λ (average number of events)
- 2Enter k (number of events of interest)
- 3Calculate using the Poisson formula
Uitgewerkte voorbeelden
Invoer
λ = 3, k = 2
Resultaat
P(X = 2) ≈ 0.224
(3² × e⁻³) / 2! ≈ 0.224
Veelgemaakte fouten om te vermijden
- ✕Confusing λ with the event value
- ✕Using Poisson when binomial is more appropriate
Klaar om te berekenen? Probeer de gratis Poisson Probability-rekenmachine
Probeer het zelf →