A researcher was interested in the effects of weather on cognitive performance. He tested participants on either sunny or cloudy days, and obtained the following scores on a 10-item test of cognitive performance.
Using these data, conduct a test to see whether performance differed on sunny and cloudy days.
| Sunny Day |
Cloudy Day |
| 7 |
7 |
| 1 |
4 |
| 3 |
1 |
| 9 |
7 |
| 6 |
5 |
| 6 |
2 |
| 8 |
9 |
| 2 |
6 |