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The Nested Test tool examines whether two models, one of which contains a subset of the variables contained in the other, are statistically equivalent in terms of their predictive capability. The larger of the two models is referred to as the "full" model, while the model that contains a subset of the variables is referred to as the "reduced" model. In the statistics literature, the "reduced" model is often called the "null" model, while the "full" model is called the "alternative" model.
In the case of two linear regression models, the test is conducted using an F-test*. For two GLM family models, including count regression, gamma regression, and logistic regression, the test is conducted using a likelihood ratio test**.
This tool uses the R programming language. Go to Options > Download Predictive Tools to install R and the packages used by the R Tool.
This tool has no configuration options.
***Quasi-poisson model not supported.
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