Scatter Diagram

A scatter diagram is primarily used when you want to determine if a pair of numerical data points have a cause-and-effect relationship with each other. A scatter diagram is effective at showing a relationship because it does a good job of showing the range of data points at any section.

The pattern of the scatter describes the relationship. To obtain Best-fit or trend lines should:

• Follow the trend of the data

• Join as many points as possible

• Leave an equal number of unconnected points on either side.