A psychologist records whether participants complete a problem-solving task or stop before the time limit.
| Testing session | Completed the task | Stopped before the time limit |
|---|---|---|
| Morning | 23 | 7 |
| Afternoon | 18 | 12 |
Calculate, to one decimal place, what percentage of the full sample stopped before the time limit. Show your working.
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.