Scatter Plot Examples
Scatter plots are used to evaluate the correlation or cause-effect relationship (if any) between two variables. There are three primary scatter plot examples:
- strong positive correlation- data points are tightly clustered along a trend line with an upward slope (as one variable increases so does the other).
- strong negative correlation - data points are tightly clustered along a trend line with a downward slope (as one variable increases the other variable decreases).
- no correlation - data points look like a shotgun blast.
Scatter Plot Example of Calories Consumed with Weight Gained - positive correlation
Scatter Plot Example - strong negative correlation
Scatter Plot Example of Staffing Vacancies with Patient Falls - little or no correlation
If the R² correlation of determination (square of the correlation coefficient) is greater than 0.8, then 80% of the variability in the data is accounted for by the equation. Most statistics books imply that this means that you have a strong correlation.
- Watch video showing how to create a Scatter Plot in Excel using the QI Macros
- Scatter Plot Diagram
- Scatter Plot Matrix for more than two variables