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Given information:
| Test score(x) | frequency(f) |
| 3 | 0 |
| 4 | 4 |
| 5 | 4 |
| 6 | 2 |
| 7 | 1 |
| 8 | 2 |
| 9 | 1 |
| 10 | 1 |
Mean:
| Test score(x) | frequency(f) | xf |
| 3 | 0 | 0 |
| 4 | 4 | 16 |
| 5 | 4 | 20 |
| 6 | 2 | 12 |
| 7 | 1 | 7 |
| 8 | 2 | 16 |
| 9 | 1 | 9 |
| 10 | 1 | 10 |
Therefore,
Thus, the mean score on the test is 6.
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