If a researcher believes a linear relationship may exist between two variables,she will need to
A) manipulate two or more independent variables.
B) have a stronger manipulation than for a linear relationship.
C) include more than two levels of the independent variable.
D) measure more than one dependent variable.

Question

Quizplus · Accepted Answer

Including more than two levels of the independent variable allows for the assessment of linearity by examining the relationship across multiple points, which is necessary to establish a linear trend.

If a Researcher Believes a Linear Relationship May Exist Between