A researcher is investigating whether there is an association between age group and primary news source. They collect survey data categorised into three age brackets ('18–29 years', '30–49 years', '50+ years') and two primary news sources ('Social Media', 'Television').
Using the extract from the table of critical values presented below, what is the critical value for use with the Chi-square (χ2\chi^2χ2) test in this study at the 5% level of significance (p≤0.05p \le 0.05p≤0.05)?
| Degrees of freedom (dfdfdf) | 0.10 | 0.05 | 0.02 | 0.01 |
|---|---|---|---|---|
| 1 | 2.706 | 3.841 | 5.412 | 6.635 |
| 2 | 4.605 | 5.991 | 7.824 | 9.210 |
| 3 | 6.251 | 7.815 | 9.837 | 11.345 |
| 4 | 7.779 | 9.488 | 11.668 | 13.277 |
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.