Constructing a relative frequency histogram:
1. the number of classes, usually between 5 and 10.
2. the approximate class width by dividing the difference between the largest and smallest values by the number of classes.
3. the approximate class width up to a convenient number.
4. If discrete, one or more integers to a class.
5. the class boundaries.
6. a statistical table containing the classes, their boundaries, and their relative frequencies.
7. the histogram like a bar graph.
©1998 Brooks/Cole Publishing/ITP