A psychology study has two groups of participants. Each participant completes every trial in their group.
| Group | Participants | Trials per participant |
|---|---|---|
| A | 28 | 19 |
| B | 34 | 22 |
A student reports that the participants completed 1280 trials altogether.
Use an estimate to check whether the student's total is correct, and calculate the exact total.
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.