Dr. Aris conducted a study on sleep duration and memory recall using a sample of N=8N = 8N=8 participants. He calculated a Spearman's rank correlation coefficient (rsr_srs) of 0.850 for a directional (one-tailed) hypothesis.
Using the critical values table below, determine the lowest level of significance (the most stringent ppp-value) Dr. Aris could use for his results to still be considered statistically significant.
| N | Level of significance for a one-tailed test | ||||
|---|---|---|---|---|---|
| 0.05 | 0.025 | 0.01 | 0.005 | 0.0025 | |
| Level of significance for a two-tailed test | |||||
| 0.10 | 0.05 | 0.025 | 0.01 | 0.005 | |
| 5 | 0.900 | 1.000 | 1.000 | 1.000 | 1.000 |
| 6 | 0.829 | 0.886 | 0.943 | 1.000 | 1.000 |
| 7 | 0.714 | 0.786 | 0.893 | 0.929 | 0.964 |
| 8 | 0.643 | 0.738 | 0.833 | 0.881 | 0.905 |
| 9 | 0.600 | 0.700 | 0.783 | 0.833 | 0.867 |
| 10 | 0.564 | 0.648 | 0.745 | 0.794 | 0.830 |
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.