Use the following to answer the question(s) below.
Weekly commodity prices for heating oil (in cents) were obtained and regressed against time. Below is the regression output and residual plots from fitting a linear model.
-Which assumption appears to be violated?
A) Linearity
B) Normality
C) Equal Variance
D) Linearity and Normality
E) Linearity, Normality and Equal Variance assumptions are violated.

Question

Use the following to answer the question(s) below.
Weekly commodity prices for heating oil (in cents) were obtained and regressed against time. Below is the regression output and residual plots from fitting a linear model.    
-Which assumption appears to be violated?
A) Linearity 
B) Normality 
C) Equal Variance 
D) Linearity and Normality 
E) Linearity, Normality and Equal Variance assumptions are violated.

Quizplus · Accepted Answer

All three assumptions—linearity, normality, and equal variance—are indicated as being violated.

Use the Following to Answer the Question(s) Below