A psychologist records the number of correct decisions made by five participants in a decision-making task. The results are shown below.
| Participant | Correct decisions out of 20 |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 10 |
| 4 | 15 |
| 5 | 19 |
State the measure of central tendency that should be used for this set of results. Explain why it is appropriate. Calculate the range.
173 exam-style questions on OCR GCSE Psychology 7.3 Analysing Research, covering 7.3.1 Types of Data, 7.3.2 Measures of central tendency, 7.3.3 Other descriptive statistics, 7.3.4 Tables, Charts and Graphs, 7.3.5 Reliability, 7.3.6 Validity and effects on validity, and 7.3.7 Sources of bias. Each one has a worked solution and a mark scheme showing where the marks go.