1MA0 Foundation November 2012 Paper 1 Q18
18 Yan recorded the ages, in years, of a sample of people at a fairground.
He drew this stem and leaf diagram for his results.
| 1 | 5 5 7 7 7 7 9 |
| 2 | 0 3 7 8 8 |
| 3 | 4 6 7 7 |
| 4 | 2 5 9 |
| 5 | 0 5 |
Key: 1 | 5 represents 15 years of age
(a) Write down the number of people in the sample. (1)
(b) Write down the mode.
years (1)
years (1)
(c) Work out the range.
years (2)
years (2)
| Answer | Mark | Notes |
|---|---|---|
| 21 | 1 | B1 cao |
| Answer | Mark | Notes |
|---|---|---|
| 17 | 1 | B1 cao |
| Working | Answer | Mark | Notes |
|---|---|---|---|
| \(55 - 15\) | 40 | 2 | M1 for \(55 - 15\) (accept \(15 - 55\) or 15 to 55 or 55 to 15 or 15, 55 but not \(15 + 55\)) A1 cao |