A psychologist records how long 48 children continue playing with a new puzzle before choosing another activity.
| Time spent playing (minutes) | Frequency |
|---|---|
| 0 to under 2 | 7 |
| 2 to under 4 | 14 |
| 4 to under 6 | ? |
| 6 to under 8 | 9 |
| 8 to under 10 | 6 |
Calculate the fraction of children who spent 4 minutes or more playing with the puzzle. Give your answer in its lowest terms.
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.