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 ...

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. A human craving for simplicity is hindering retail’s optimization of artificial intelligence ...