Dr. Vance was interested in whether there was a difference in the working memory performance of participants who completed two different cognitive training courses: Program Alpha and Program Beta.
Dr. Vance recruited 16 volunteers from a university and randomly allocated 8 to Program Alpha and 8 to Program Beta. After completing their respective training, each participant's working memory was assessed by recording the total number of errors they made during a standardized dual-n-back task.
The results of Dr. Vance's study are shown in the table below.
| Program Alpha participants | Number of errors on dual-n-back task | Program Beta participants | Number of errors on dual-n-back task |
|---|---|---|---|
| P1 | 12 | P9 | 9 |
| P2 | 5 | P10 | 16 |
| P3 | 19 | P11 | 4 |
| P4 | 8 | P12 | 11 |
| P5 | 15 | P13 | 13 |
| P6 | 11 | P14 | 7 |
| P7 | 5 | P15 | 18 |
| P8 | 14 | P16 | 10 |
Calculate the median number of errors made by the participants who completed Program Alpha.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.