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DISCRIMINANT FUNCTION ANALYSIS (DA)

DISCRIMINANT FUNCTION ANALYSIS (DA). John Poulsen and Aaron French Key words: assumptions, further reading, computations, standardized coefficents, structure matrix, tests of signficance Introduction DISCRIMINANT FUNCTION ANALYSIS is used to determine which continuous variables discriminate between two or more naturally occurring groups. For example, a researcher may want to investigate which variables discriminate between fruits eaten by (1) primates, (2) birds, or (3) squirrels. For that purpose, the researcher could collect data on numerous fruit characteristics of those species eaten by each of the animal groups.

Normal distribution: It is assumed that the data (for the variables) represent a sample from a multivariate normal distribution. You can examine whether or not ... discriminant function coefficients will not reliably assess the relative importance of the predictor variables.

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