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 with positive correlation created using the QI Macros SPC Software

Scatter Plot Example - strong negative correlation

scatter plot example with negative correlation created using the QI Macros SPC Software

Scatter Plot Example of Staffing Vacancies with Patient Falls - little or no correlation

scatter plot example with no correlation created using the QI Macros SPC Software

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.

Learn More...

Create these charts and diagrams in just seconds using QI Macros for Excel...
Try It Now!