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?
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