Problem-Solving and Data AnalysisEasy–MediumScatterplot showing no association
Problem-Solving and Data Analysis practice question
Which of the following descriptions of a scatterplot indicates NO association between the two variables?
- A. The points are scattered evenly across the plot with no visible pattern.Correct
- B. The points lie close to a line that rises from left to right.
- C. The points lie close to a line that falls from left to right.
- D. The points follow a curve that rises and then falls.
Answer: A. The points are scattered evenly across the plot with no visible pattern.
An association means y tends to change in some pattern as x changes. Evenly scattered points with no pattern show none.
Why the other answers are wrong
- B. The points lie close to a line that rises from left to right.
- A rising line is a positive association.
- C. The points lie close to a line that falls from left to right.
- A falling line is a negative association.
- D. The points follow a curve that rises and then falls.
- A curve is still a pattern — a nonlinear association.
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