The researchers in a social influence study on bystander intervention decided to carry out a chi-squared test on their data from Table 1. They found an observed/calculated value of 2.10 for a one-tailed (directional) test at the 5% level of significance when df=1df=1df=1.
| Condition | Reported the emergency | Did not report the emergency |
|---|---|---|
| High Social Density (N = 30) | 12 | 18 |
| Low Social Density (N = 30) | 18 | 12 |
| Level of significance for a one-tailed test | 0.10 | 0.05 | 0.025 | 0.01 | 0.005 |
|---|---|---|---|---|---|
| Level of significance for a two-tailed test | 0.20 | 0.10 | 0.05 | 0.02 | 0.01 |
| df = 1 | 1.64 | 2.71 | 3.84 | 5.41 | 6.64 |
Explain what this calculated value shows in terms of the reporting behavior of the participants in the study.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 100 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.