Comparison of Coefficients of Variation

Performs a test for the comparison of two coefficients of variation (from independent samples), expressed as a percentage.

This test is not performed on data in the data table, but on statistics you enter in a dialog box.

Required input

  • Enter the two coefficients of variation, expressed as percentages, and the corresponding number of cases.


When the calculated P value is less than 0.05, the conclusion is that the two coefficients of variation are significantly different.

Computational notes uses the test by Forkman, 2009.


  • Forkman J (2009) Estimator and tests for common coefficients of variation in normal distributions. Communications in Statistics - Theory and Methods 38:233-251.


Go to Comparison of Coefficients of Variation.