The bar chart shows how many hours of homework 30 students did last week.

| Hours of Homework | Number of Students |
|---|---|
| 0 to 2 | 6 |
| 3 to 5 | 9 |
| 6 to 8 | 8 |
| 9 to 11 | 4 |
| 12 to 14 | 3 |
Calculate an estimate for the mean number of hours of homework.
Practise OCR GCSE Maths Averages from Frequency Tables with exam-style questions for Foundation and Higher tier. 32 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.