Based on the residual plot, is a linear model appropriate for describing the relationship between
brain mass and body mass?
A biologist is studying the relationship between the
mass of brains found in mammals taken from a forest
and the body mass of the mammals. A sample of 14
such mammals was taken. The equation of the least-
squares line for the relationship between brain mass
and body mass is computed as
body mass -561.9(brain mass) - 16485.
O Alinear model is not appropriate, because the
residuals are not centered about zero,
O A linear model is appropriate, because there is a
clear pattern shown in the residual plot
O Alinear model is not appropriate, because there is a
clear pattern shown in the residual plot
O A linear model is appropriate, because many of the
rosiduals are close to zero for all brain weights.
Brain Mass vs. Body Mass
20,000
15,000
10,000
5,000
Residual
0
5,000
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