This applet computes probabilities for the binomial distribution X∼Bin(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(X≤x) from the drop-down box for a left-tail probability (this is the cdf).
If n≥30, np≥5, and n(1−p)≥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.