Here are the test scores for six students.
| 14 | 22 | 18 | 9 | 15 | 15 |
| ---- | --- | ---- | --- | ---- | ---- |
Work out the range of the test scores.
Work out the mean of the test scores.
Practise WJEC GCSE Maths Averages with exam-style questions for Foundation and Higher tier. 48 questions, matched to the WJEC GCSE Maths (3320QD) specification and written in Unit 1, Unit 2 and Unit 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.