Question: 7.1. Explore the anorexia data example introduced in the discussion of offsets on page 217 and report your final linear model. Begin with a Trellis

7.1. Explore the anorexia data example introduced in the discussion of offsets on page 217 and report your final linear model.

Begin with a Trellis display of the data showing post-treatment weight against pre-treatment weight for the three treatment groups. In each panel inelude the individual regression line, the parallel regression line and the parallel regression line with slope 1 as well as the points.

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