Eight participants completed a face-recognition task marked out of 20.
| Score | Frequency |
|---|---|
| 4 | 1 |
| 14 | 2 |
| 15 | 3 |
| 16 | 2 |
The researcher used the range to conclude that performance differed greatly between the participants.
Explain, using a calculation, why this conclusion is not a good description of most participants.
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.