In an investigation into the impact of background noise on reading comprehension, Dr. Bennett obtained a calculated Wilcoxon T T\,T value of 14 for N=12N = 12N=12 (where N N\,N represents the number of participants with non-zero difference scores).
Using the Wilcoxon critical values table below, determine whether Dr. Bennett's results are significant at p≤0.05 p \le 0.05\,p≤0.05 for a directional (one-tailed) hypothesis.
| NNN | Level of significance for a one-tailed test | ||
|---|---|---|---|
| 0.05 | 0.025 | 0.01 | |
| Level of significance for a two-tailed test | |||
| 0.1 | 0.05 | 0.02 | |
| N=5N=5N=5 | 0 | - | - |
| 6 | 2 | 0 | - |
| 7 | 3 | 2 | 0 |
| 8 | 5 | 3 | 1 |
| 9 | 8 | 5 | 3 |
| 10 | 11 | 8 | 5 |
| 11 | 13 | 10 | 7 |
| 12 | 17 | 13 | 9 |
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.