Based on the following scatter plot of age versus blood pressure, which of the regression assumptions may be violated?
A) Mean error = 0.
B) Error variance is constant.
C) Errors are normally distributed.
D) Errors are independent.

Question

Based on the following scatter plot of age versus blood pressure, which of the regression assumptions may be violated? 
A) Mean error = 0. 
B) Error variance is constant. 
C) Errors are normally distributed. 
D) Errors are independent.

Quizplus · Accepted Answer

The scatter plot shows a pattern of increasing variability in blood pressure as age increases, violating the assumption of constant error variance.

Based on the Following Scatter Plot of Age Versus Blood