A researcher investigated the relationship between physical exercise and sleep quality. Each participant's sleep quality was measured using a questionnaire, giving a score out of 15 (where 0 represented extremely poor sleep and 15 represented excellent sleep).
The raw data collected is shown in Table 2.
Table 2: The number of weekly exercise hours for each participant (labelled A – K) and their sleep quality scores.
| A | B | C | D | E | F | G | H | I | J | K | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of weekly exercise hours | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Sleep quality score | 4 | 6 | 7 | 7 | 9 | 12 | 11 | 7 | 14 | 15 | 14 |
The researcher looked at the mode and median sleep quality scores of the participants. Calculate these two descriptive statistics.
235 exam-style questions on AQA A Level Psychology Data handling and analysis. Each one has a worked solution and a mark scheme showing where the marks go.