A researcher designed a study to test whether players of the "Drop 7" smartphone app at-tain a higher score if offered a monetary incentive. Of 40 volunteers, 20 were randomly as-signed to a group where high scorers were paid $5 and the other 20 to a group simply told to "do your best." The researcher found that, on average, the volunteers in the group getting the monetary incentive scored substantially higher than those who did not receive a mone-tary incentive (mean score of 13,500 points in the group without the monetary incentive; 15,900 points in the monetary incentive group). Identify the steps of a statistical investiga-tion in this study by answering the following questions about this study.
-Step 2: Design a study and collect data. What are the variables in this study and their types? Select all that apply.
A) Mean scores in each group; quantitative
B) Whether a volunteer was assigned to a monetary incentive or not; categorical
C) A volunteer's "Drop 7" score; quantitative
D) A volunteer's "Drop 7" score; categorical

Question

Quizplus · Accepted Answer

The variables in this study are whether a volunteer was assigned to a monetary incentive or not, which is a categorical variable, and a volunteer's "Drop 7" score, which is a quantitative variable.

A Researcher Designed a Study to Test Whether Players of the "Drop