Example: If the data is
Example:
Bin | Frequency |
---|---|
[0,20) | 1 |
[20,40) | 1 |
[40,60) | 0 |
[60,80) | 2 |
[80,100) | 6 |
If the bases of all the rectangles are the same, the heights of the rectangles are propostional to the areas, which simplifies things.
The spread is the distance between the center and one of its inflection points.