qualitative variable in a sentence

Suppose we consider an ANOVA model having two qualitative variables, each with two categories : Hourly Wages are to be explained in terms of the qualitative variables Marital Status ( Married / Unmarried ) and Geographical Region ( North / Non-North ).
Suppose we consider an ANOVA model having two qualitative variables, each with two categories : Hourly Wages are to be explained in terms of the qualitative variables Marital Status ( Married / Unmarried ) and Geographical Region ( North / Non-North ).
To illustrate how qualitative and quantitative regressors are included to form ANCOVA models, suppose we consider the same example used in the ANOVA model with one qualitative variable : average annual salary of public school teachers in three geographical regions of Country A . If we include a quantitative variable, " State Government expenditure on public schools per pupil ", in this regression, we get the following model:

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