Ch. 20 Time-Series Analysis

Question 1

Multiple Regression Model Assumptions

Answer 1

1. Linearity
2. Independent Errors
3. Normal errors
4. Equal Error Variances

Question 2

Linearity Assumption

Answer 2

Residual by Predicted Plot does not reveal any obvious curved pattern

Question 3

Independent Errors Assumption

Answer 3

Residual by Row Plot does not reveal any obvious pattern

Question 4

Normal Errors Assumption

Answer 4

The residuals in the Normal Probability Plot do not stray away from the straight line pattern

Question 5

Equal Error Variance Assumption

Answer 5

The spread of the residuals in the Residual by Predicted Plot does not increase as the predicted values increase (no fanning)