A psychologist investigates whether the amount of time pupils spend practising a memory task is related to their score on a later memory test. The results are shown below.
| Practice time (minutes) | Memory-test score (out of 20) |
|---|---|
| 10 | 8 |
| 20 | 10 |
| 30 | 11 |
| 40 | 14 |
| 50 | 15 |
| 60 | 17 |
Draw a scatter diagram for these results. Use practice time on the horizontal axis and memory-test score on the vertical axis. Add a suitable title and plot all six pairs of scores. Do not join the points.
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.