Quality and Process Methods > Pareto Plots > Statistical Details for the Pareto Plot Platform
Publication date: 05/24/2021

Statistical Details for the Pareto Plot Platform

Likelihood Ratio Chi-Square Test

Notation

The likelihood ratio Chi-square test statistic computed in the Pareto Plot platform uses the following notation:

nij is the count for Cause i in Group j.

Ej is the expected count for Group j. This is the mean count of each group, across causes.

Ei is the expected count for Cause i. This is the mean count of each cause, across groups.

Likelihood Ratio Chi-Square Test Statistic within Groups

Equation shown here

Likelihood Ratio Chi-Square Test Statistic across Groups

Equation shown here

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