## Methods Planning And Evaluation, Inc

## Design Phase Overview

Because dummy coding compares the mean of the dependent variable for each level of the explicit variable to the mean of the dependent variable at for the reference group, it is smart with a nominal variable. However, it could not make as a lot sense to use a coding scheme that exams the lineareffect of race.

### Neena Rajan, Engineering Project Supervisor, Siemens

In our example below, the primary comparison compares the the mean of write for degree 1 with the mean of write for degree 2 of race . The second comparability compares the imply of write for level 2 minus degree 3, and the third comparison compares the imply of write for level 3 minus stage four. This kind of coding may be useful with either a nominal or an ordinal variable. Below we are going to present examples using race as a categorical variable, which … Read More