If you would rather not install the CDF player, you can try to SageMath verison that does not require you to install anything.

If using Chrome, download and open separately by clicking here and here .

In both pictures below, the Binomial distribution is displayed in

In the first, the Poisson distribution (with mean = n*p) is displayed in

In the second, the Normal distribution (with mean = n*p and variance = n*p*(1-p)) is displayed in

Try playing around with the sliders -- Under what conditions do we have a good approximation?

This applet was made by A. Sanchez for use at Tufts University.