A psychologist records how long 24 participants spend making eye contact during a two-minute conversation task. The results are grouped below.
| Time spent making eye contact (seconds) | Frequency |
|---|---|
| 0 to under 10 | 3 |
| 10 to under 20 | 8 |
| 20 to under 30 | 9 |
| 30 to under 40 | 4 |
State the frequency for the 30 to under 40 seconds group. Then give this group's share of all participants as a fraction in its simplest form.
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.