A scatter diagram can be used to see
A) if the value of a variable is rising or falling.
B) the value of a variable for different groups in a population.
C) if a relationship exists between two variables.
D) how a variable behaves over time.
E) whether a variable is positively or negatively related to itself.

Question

Quizplus · Accepted Answer

A scatter diagram is used to visualize the relationship between two variables. It shows if there is a correlation between them and if so, whether it is positive, negative or has no correlation. It does not show if the value of a variable is rising or falling, or the value of a variable for different groups in a population. It is not specifically designed to show how a variable behaves over time, although time can be plotted on one axis. It also does not show whether a variable is positively or negatively related to itself, as that is not a meaningful concept.

A Scatter Diagram Can Be Used to See