Chapter 12.1, Problem 5E

To determine

To Explain: that whether the state for performing inference about the regression model are met or not.

Answer to Problem 5E

Conditions have been met.

Explanation of Solution

Given:

  

  

There are total five conditions for the regression inferences are normal, equal variance, random, independent and linear.

Normal: satisfied, the reason is that the histogram is bell shaped.

Equal variance: satisfied, the reason is that the vertical spread of points in the residual figure is approximately the same everywhere.

Random: satisfied, the reason is that the subject were arbitrary assigned.

Independent: satisfied, because the subjects were arbitrary assigned.

Linear: satisfied, because of all points in the residual figure are centred approximately zero.

Therefore all states or conditions have been satisfied.