Refer to Exercise 12.6. Suppose the researcher wants to determine if the new program is more appropriate for girls than boys. The indicator variable, x3, was now included in the model, where

A general linear model was used to model S as a function of x1, x2, and x3:

a. Using the βs from the above model, express the mean scores for boys and girls en-rolled in the new program who lived in homes in which English is not spoken.
b. Express the difference in the mean scores for the new and old programs for girls who lived in homes in which English was not spoken.
c. Express the difference in the mean scores for the new and old programs for boys who lived in homes in which English was spoken.

Transcribed Image Text:

1 if girl G=t0 if boy