A researcher studies the relationship between the amount of time spent studying for an exam and the number of errors made.A sample of twenty students who have the same GPA are randomly assigned to one of four groups: 1,2,3,or 4 hours of study time.After studying the specified time,all students took an identical exam and the number of errors each student made was counted.
Which of the following variables was held constant in the study?
A)number of errors made
B)GPA of the students
C)number of hours studied
D)none of the variables was held constant in the study

Question

Quizplus · Accepted Answer

The GPA of the students was held constant, as all students were selected based on having the same GPA. This allows for the variable of study time to be the only factor in determining the number of errors made, as GPA is not a factor.

A Researcher Studies the Relationship Between the Amount of Time