4MA0 Higher June 2016 Paper 3R Q10
10 Julie asked 50 children how many exercise sessions they each took part in last month.
The table shows information about her results.
| Number of exercise sessions | Frequency |
|---|---|
| 0 to 6 | 13 |
| 7 to 13 | 10 |
| 14 to 20 | 16 |
| 21 to 27 | 7 |
| 28 to 34 | 4 |
Calculate an estimate for the total number of exercise sessions the children took part in last month.
(3)
| Scheme | Marks |
|---|---|
| 3 × 13 + 10 × 10 + 17 × 16 + 24 × 7 + 31 × 4 Or 39 + 100 + 272 + 168 + 124 | M1 |
| M1 | |
| 703 | A1 |
| (3) |
Notes
M1: For at least 2 products \(f \times x\) consistently within intervals (including end points)
M1: For completely correct method (condone 1 error)
NB: Products do not need to be evaluated
A1: cao Do not ISW to find mean
SC award 2 marks for 14.06 if no other marks gained