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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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STATISTICS Subcommand<br />

DISCRIMINANT 479<br />

By default, DISCRIMINANT produces the following statistics for each analysis: analysis case<br />

processing summary, valid numbers of cases in group statistics, variables failing tolerance<br />

test, a summary of canonical discriminant functions, standardized canonical discriminant<br />

function coefficients, a structure matrix showing pooled within-groups correlations between<br />

the discriminant functions and the predictor variables, and functions at group centroids.<br />

• Group statistics. Only valid number of cases is reported.<br />

• Summary of canonical discriminant functions. Displayed in two tables: an eigenvalues<br />

table with percentage of variance, cumulative percentage of variance, and canonical<br />

correlations and a Wilks’ lambda table with Wilks’ lambda, chi-square, degrees of<br />

freedom, and significance.<br />

• Stepwise statistics. Wilks’ lambda, equivalent F, degrees of freedom, significance of F<br />

and number of variables are reported for each step. Tolerance, F-to-remove, and the value<br />

of the statistic used for variable selection are reported for each variable in the equation.<br />

Tolerance, minimum tolerance, F-to-enter, and the value of the statistic used for variable<br />

selection are reported for each variable not in the equation. (These statistics can be<br />

suppressed with HISTORY=NONE.)<br />

• Final statistics. Standardized canonical discriminant function coefficients, the structure<br />

matrix of discriminant functions and all variables named in the analysis (whether they<br />

were entered into the equation or not), and functions evaluated at group means are<br />

reported following the last step.<br />

In addition, you can request optional statistics on the STATISTICS subcommand. STATISTICS<br />

can be specified by itself or with one or more keywords.<br />

• STATISTICS without keywords displays MEAN, STDDEV, and UNIVF. If you include a<br />

keyword or keywords on STATISTICS, only the statistics you request are displayed.<br />

MEAN Means. Total and group means for all variables named on the ANALYSIS<br />

subcommand are displayed.<br />

STDDEV Standard deviations. Total and group standard deviations for all variables<br />

named on the ANALYSIS subcommand are displayed.<br />

UNIVF Univariate F ratios. The analysis-of-variance F statistic for equality of group<br />

means for each predictor variable is displayed. This is a one-way analysis-ofvariance<br />

test for equality of group means on a single discriminating variable.<br />

COV Pooled within-groups covariance matrix.<br />

CORR Pooled within-groups correlation matrix.<br />

FPAIR Matrix of pairwise F ratios. The F ratio for each pair of groups is displayed.<br />

This F is the significance test for the Mahalanobis distance between groups.<br />

This statistic is available only with stepwise methods.<br />

BOXM Box’s M test. This is a test for equality of group covariance matrices.<br />

GCOV Group covariance matrices.<br />

TCOV Total covariance matrix.

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