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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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814 LOGISTIC REGRESSION<br />

ZRESID Normalized residual. Residual divided by the square root of the product of<br />

PRED and 1–PRED.<br />

LEVER Leverage value. A measure of the relative influence of each observation on<br />

the model’s fit.<br />

COOK Analog of Cook’s influence statistic.<br />

DFBETA Difference in beta. The difference in the estimated coefficients for each<br />

independent variable if the case is omitted.<br />

The following keyword is available for restricting the cases to be displayed, based on the<br />

absolute value of SRESID:<br />

OUTLIER (value) Cases with absolute values of SRESID greater than or equal to the<br />

specified value are displayed. If OUTLIER is specified with no value,<br />

the default is 2.<br />

Example<br />

LOGISTIC REGRESSION PROMOTED WITH JOBTIME SEX RACE<br />

/CATEGORICAL SEX RACE<br />

/METHOD ENTER<br />

/CASEWISE SRESID LEVER DFBETA.<br />

• CASEWISE produces a casewise listing of the temporary variables SRESID, LEVER, and<br />

DFBETA.<br />

• There will be one DFBETA value for each parameter in the model. The continuous variable<br />

JOBTIME, the two-level categorical variable SEX, and the constant each require one<br />

parameter while the four-level categorical variable RACE requires three parameters. Thus,<br />

six values of DFBETA will be produced for each case.<br />

MISSING Subcommand<br />

LOGISTIC REGRESSION excludes all cases with missing values on any of the independent<br />

variables. For a case with a missing value on the dependent variable, predicted values are<br />

calculated if it has nonmissing values on all independent variables. The MISSING subcommand<br />

controls the processing of user-missing values. If the subcommand is not specified, the<br />

default is EXCLUDE.<br />

EXCLUDE Delete cases with user-missing values as well as system-missing values. This<br />

is the default.<br />

INCLUDE Include user-missing values in the analysis.<br />

SAVE Subcommand<br />

SAVE saves the temporary variables created by LOGISTIC REGRESSION. To specify variable<br />

names for the new variables, assign the new names in parentheses following each temporary<br />

variable name. If new variable names are not specified, LOGISTIC REGRESSION generates<br />

default names.

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