A two-valued qualitative variable can be represented by a single 0-or-1-valued "dummy" variable. If a qualitative variable has three or more possible values (e.g., make-of-car, or marital-status), ...

This paper proposes a method for analysing relations between a qualitative variable and a group of quantitative variables. The method is an extension of known results concerning the analysis of ...

This note describes some serious errors in the paper by H. M. Kritzer (1977). The topics considered touch upon differences between recursive and non-recursive systems of equations, the measurement of ...

The LOGISTIC procedure in SAS/STAT software fits linear logistic regression models for binary or ordinal response data by the method of maximum likelihood. Subsets of explanatory variables can be ...

This function has one quantitative and one qualitative input variable. The plot above shows the function for both possible values of the qualitative z-variable. The quantitative variable x is in [0, 1 ...