The relationship between two quantities X and Y is examined,and the association is shown in the scatterplot below.
Should you re-express these data before trying to fit a model? Explain.
A)Data should be re-expressed.Scatterplot shows upward curvature and increasing scatter as X increases.
B)Data should be re-expressed.Scatterplot shows linear relationship and uniform scatter.
C)Data does not need to be re-expressed.Scatterplot shows upward curvature and increasing scatter as X increases.
D)Data should be re-expressed.Scatterplot shows linear relationship.
E)Data does not need to be re-expressed.Scatterplot shows linear relationship.

Question

The relationship between two quantities X and Y is examined,and the association is shown in the scatterplot below. 
Should you re-express these data before trying to fit a model? Explain.
A)Data should be re-expressed.Scatterplot shows upward curvature and increasing scatter as X increases. 
B)Data should be re-expressed.Scatterplot shows linear relationship and uniform scatter. 
C)Data does not need to be re-expressed.Scatterplot shows upward curvature and increasing scatter as X increases. 
D)Data should be re-expressed.Scatterplot shows linear relationship. 
E)Data does not need to be re-expressed.Scatterplot shows linear relationship.

Quizplus · Accepted Answer

The scatterplot shows upward curvature and increasing scatter as X increases, which indicates that there may be a non-linear relationship between X and Y. Therefore, it is best to re-express the data before fitting a model.

The Relationship Between Two Quantities X and Y Is Examined,and