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Binomial Distribution
XBin(n,p)

n= p=
x=
Normal Approximation

This applet computes probabilities for the binomial distribution XBin(n,p)

Directions:

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(Xx) from the drop-down box for a left-tail probability (this is the cdf).


If n30, np5, and n(1p)5, then the normal approximation checkbox can be selected. This approximates the binomial probability (with continuity correction) and graphs the normal pdf over the binomial pmf.