Answer choice | Percentage students by condition | |
---|---|---|
Centrality (n = 47) | Variability (n = 53) | |
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 | 49 | 30 |
B. I’m not sure—I would need more information | 47 | 60 |
C. I’m fairly certain there is not an effect | 4 | 11 |
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 | 74 | 70 |
B. The standard deviation of test scores within each group | 66 | 62 |
C. A rating of how much each participant likes chocolate | 40 | 23 |
D. A list of the exact test items that were used | 21 | 36 |
E. More information about what kind of chocolate was used | 15 | 19 |
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 | 60 | 36 |
B. The standard deviation of test scores within each group | 21 | 40 |
C. A rating of how much each participant likes chocolate | 11 | 13 |
D. A list of the exact test items that were used | 2 | 6 |
E. More information about what kind of chocolate was used | 6 | 4 |