Chapter 8, Problem 3E

To determine

To explain what does it mean to say that a cereal has a negative residual.

Explanation of Solution

In previous exercise we know that, an analysis of the amount of fiber in grams and the potassium content in milligrams in serving of breakfast produced the regression model:

  $\text{<mover accent="true"><mo>P</mo><mo>^</mo></mover>otassium}=38+27\text{Fiber}$

Thus, we can say about a cereal has a negative residual that the potassium content is actually lower than the model predicts for a cereal with that much fiber.