A researcher wants findings to apply to all adults aged 18–64 living in a district. On a Saturday morning, the researcher asks the first 30 adults aged 18–64 entering a farmers’ market who agree to take part.
| Age group | Number in the target population | Number in the sample |
|---|---|---|
| 18–39 | 12,000 | 21 |
| 40–64 | 8,000 | 9 |
Explain one strength of recruiting participants in this way and one reason the results may not represent the target population. In your explanation of the limitation, compare the age proportions in the sample and target population.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.