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Tests for independence

Tests for the independence of 2 categorical variables and their properties and assumptions.

Test Purpose
Pearson X² Test if the variables are independent.  

Uses the score statistic and computes an asymptotic p-value.

Likelihood ratio G² Test if the variables are independent.  

Uses the likelihood ratio statistic and computes an asymptotic p-value.   Pearson X² usually converges to the chi-squared distribution more quickly than G². The likelihood ratio test is often used in statistical modeling as the G² statistic is easier to compare between different models.

Related concepts
Independence hypothesis test
Hypothesis testing
Exact and asymptotic p-values
Continuity correction
Related tasks
Testing independence
Available in Analyse-it Editions
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Version 6.15
Published 18-Apr-2023
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