In trying to obtain a model to estimate grades on a statistics test,a lecturer wanted to include,among other factors,whether the person had taken the course previously.To do this,the lecturer included a dummy variable in her regression that was equal to 1 if the person had previously taken the course,and 0 otherwise.The interpretation of the coefficient associated with this dummy variable would be the mean amount the repeat students tended to be above or below non-repeaters,with all other factors the same.

Question

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This is a correct interpretation of the coefficient associated with the dummy variable representing whether a person had previously taken the course or not. It indicates the mean difference in grades between repeat students and non-repeaters, controlling for the other factors in the regression model.

In Trying to Obtain a Model to Estimate Grades on a Statistics