User Guide

423

Linear Regress

ion

of regression that do include a constant. For example, R

cannot be interpreted

in the usual way.

Missing Val

ues.

You can choose one of the following:

 Exclude cas

es listwise.

Only cases with valid values for all variables are included

in the analyses.

 Exclude cases pairwise. Cases with complete data for the pair of variables being

correlated are used to compute the correlation coefficient on which the regression

analysis is

based. Degrees of freedom are based on the minimum pairwise N.

 Replace wi

th mean.

All cases are used for computations, with the mean of the

variable substituted for missing observations.