When a bar graph or histogram is shaped like a perfect bell curve, we say that the data is normally distributed.
The Normal Distribution Curve
Using the Normal Distribution Curve to Find Probability
Note: Questions may ask for probability, percent, fraction or area under the curve. These questions are all asking for the same thing.
Using the Normal Distribution Curve to Find x values
Using the Calculator to Find Probability
Using the Calculator to find x values (invnorm)
Finding Mean or Standard Deviation When Given the X value and Probability (Using the Z Curve)
Standard Normal Distribution Curve/ Z curve