# Question

The following output summarizes the fit of an analysis of covariance to the data in Exercise 35. The variable D denotes a dummy variable, with D = + for values colored green and 0 otherwise.

(a) Does the fit of the model suggest parallel equations for the two groups?

(b) How would the output change if the coding of the dummy variable D were reversed (so that 0s became 1s and vice versa)?

(c) What should be the next step in analyzing these data, specifically thinking of the form of the fitted model?

(a) Does the fit of the model suggest parallel equations for the two groups?

(b) How would the output change if the coding of the dummy variable D were reversed (so that 0s became 1s and vice versa)?

(c) What should be the next step in analyzing these data, specifically thinking of the form of the fitted model?

## Answer to relevant Questions

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