Poisson distribution
Poisson distribution is discrete (like the binomial) because the values that can take the random variable are natural numbers, although in the Poisson distribution all the possible cases are theoretically infinite.
Poisson distribution is characterized by a single parameter lambda. Its mean is lambda and its variance is also lambda.
The mean is represented by a triangle and it can be seen as a point of equilibrium. Dragging it we modify the lambda parameter.
We can show a normal curve that has the same mean and variance that the Poisson distribution. This normal curve approximate the Poisson distribution in some cases.
The gray dots control vertical and horizontal scales. Pressing and dragging the right button we can move the graphic left and right.
