Question

Weinstein, McDermott, and Roediger (2010) published

an experimental study examining different techniques

that students use to prepare for a test. Students read a

passage, knowing that they would have a quiz on the

material. After reading the passage, students in one

condition were asked to continue studying by simply

reading the passage again. In a second condition,

students answered a series of prepared questions about

the material. Then all students took the quiz. The

following table shows quiz scores similar to the results

obtained in the study.

Quiz Scores for Two Groups of Students

Simply Reread Answer Questions

8, 5, 7, 9, 8 9, 7, 8, 9, 9

9, 9, 8, 6, 9 8, 10, 9, 5, 10

7, 7, 4, 6, 5 7, 9, 8, 7, 8

Sketch a polygon showing the frequency distribution

for students who reread the passage. In the same graph,

sketch a polygon showing the scores for the students

who answered questions. (Use two different colors

or use a solid line for one polygon and a dashed line

for the other.) Does it look like there is a difference

between the two groups?

Answer 1