Marcus is investigating whether there is a difference in working memory performance when participants are exposed to background music compared to silence. He tests 10 participants in a short-term memory recall task where they have to remember a list of 20 words.
Table 1 shows the raw data from his experiment.
| Participant number | Number of words recalled in the 'With Music' condition | Number of words recalled in the 'In Silence' condition |
|---|---|---|
| 1 | 9 | 12 |
| 2 | 14 | 10 |
| 3 | 6 | 8 |
| 4 | 11 | 15 |
| 5 | 5 | 11 |
| 6 | 12 | 14 |
| 7 | 7 | 9 |
| 8 | 10 | 11 |
| 9 | 8 | 13 |
| 10 | 13 | 7 |
| Range |
Calculate the range of scores Marcus gathered in both conditions of his study.
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