A bell curve is a statistical graph shaped like a bell. It is used for several activities, such as finding percentiles or probabilities based on data you collect. Texas Instruments has a series of graphing calculators. Using these calculators, you can graph the bell curve. This is a good function to learn because it allows you to visually see your bell curve and you do not need to manually produce the curve.

Press the "Y=" button.

Press "2nd" then "VARS."

Press "1."

Type "X,0,1)." These set your bell curve up for a normal distribution. The X is your variable. The 0 is your mean and the 1 is your standard deviation.

## Sciencing Video Vault

Press "GRAPH."