Question 1. Based on the description of the study, what would you conclude about the effect of eating chocolate on test performance?

A. I am fairly certain there is an effect

48

B. I’m not sure—I would need more information

50

C. I’m fairly certain there is not an effect

2

Question 2. Which of the following additional pieces of information would be useful for determining if chocolate had an effect on test performance? (select all that apply.)

A. The mean test scores for each group

81

B. The standard deviation of test scores within each group

74

C. A rating of how much each participant likes chocolate

16

D. A list of the exact test items that were used

27

E. More information about what kind of chocolate was used

8

Question 3. If you could only choose one, which of the following additional pieces of information would be most useful for determining if chocolate had an effect on test performance?

A. The mean test scores for each group

61

B. The standard deviation of test scores within each group

24

C. A rating of how much each participant likes chocolate

6.5

D. A list of the exact test items that were used

6.5

E. More information about what kind of chocolate was used

2
