# Question

Refer to Exercise 16.1. Suppose you failed to reject the hypothesis that the four treatment lines are parallel, that is, the data indicates that the four slopes are equal.

a. Describe how would you test for differences in the adjusted treatment means. Make sure to include all necessary models.

b. Provide the form of the estimated mean response for supplement 1 for subjects of age 45 years.

a. Describe how would you test for differences in the adjusted treatment means. Make sure to include all necessary models.

b. Provide the form of the estimated mean response for supplement 1 for subjects of age 45 years.

## Answer to relevant Questions

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