Poisson Distribution
$X \sim Pois(\lambda)$


This applet computes probabilities for the Poisson distribution: $$X \sim Pois(\lambda)$$


To compute a probability, select $P(X=x)$ from the drop-down box, enter a numeric $x$ value, and press "Enter" on your keyboard. The probability $P(X=x)$ will appear in the pink box. Select $P(X \leq x)$ from the drop-down box for a left-tail probability (this is the cdf).