4400 Higher June 2007 Paper 4 Q13
13 Here are the marks scored in a maths test by the students in two classes.
| Class A | 2 | 13 | 15 | 16 | 4 | 6 | 19 | 10 | 11 | 4 | 5 | 15 | 4 | 16 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class B | 12 | 11 | 2 | 5 | 19 | 14 | 6 | 6 | 10 | 14 | 9 |
(a) Work out the interquartile range of the marks for each class. (4)
(b) Use your answers to give one comparison between the marks of Class A and the marks of Class B. (1)
| Scheme | Marks |
|---|---|
| Attempt arrange one set in order | M1 |
| State or indicate correct 15 & 4 or 14 & 6 | M1 |
| A: 11 B: 8 | A1 A1 |
| (4) |
Notes
A1 A1: NB: IQR for B = 8, check wking
| Scheme | Marks |
|---|---|
| A more spread or gter dispersion or less consistent than B | B1ft |
| (1) | |
| (5 marks) |
Notes
B1ft: Consistent with (a). Ignore other.
Not: gter “range” or “difference” or “more constant” or “gter IQR” or “gter variance”