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Modeling and Multivariate Methods - SAS

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Chapter 5 Fitting Multiple Response Models 173<br />

Discriminant Analysis<br />

• The interaction effect between Month, Time, <strong>and</strong> treatment is not statistically significant.<br />

Figure 5.12 Cholesterol Study Results<br />

Discriminant Analysis<br />

Discriminant analysis is a method of predicting some level of a one-way classification based on known<br />

values of the responses. The technique is based on how close a set of measurement variables are to the<br />

multivariate means of the levels being predicted. Discriminant analysis is more fully implemented using the<br />

Discriminant Platform (“Performing Discriminant Analysis” on page 491).<br />

In JMP you specify the measurement variables as Y effects <strong>and</strong> the classification variable as a single X effect.<br />

The multivariate fitting platform gives estimates of the means <strong>and</strong> the covariance matrix for the data,<br />

assuming that the covariances are the same for each group. You obtain discriminant information with the<br />

Save Discrim option in the popup menu next to the MANOVA platform name. This comm<strong>and</strong> saves<br />

distances <strong>and</strong> probabilities as columns in the current data table using the initial E <strong>and</strong> H matrices.

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