Chi-Square Goodness of Fit

Summary

Tests whether an experimental profile is the same as or different than a baseline profile. For example, is the current accounts payable aging profile the same as or different than the accounts payable historical profile? The input data from the process must describe two separate profiles.

Answers the question:
  • Does the profile of my sample data match the baseline profile?

How-To

Enter the data as follows:

  1. In the first column, enter the name of the categories:
    • Example 1: <30 days, 30 to 60 days, 60 to 90 days, or over 90 days
    • Example 2: Conservative, Liberal, Independent , or Unknown
  2. In the second column, set up the baseline profile by entering either counts or percents for each category.
  3. In the third column, set up the experimental profile by entering counts for each category.

Guidelines

The results simply tell you whether the profiles are different. You must look at the raw data to determine the location of any differences and whether any observed differences are "good" or "bad."

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