4MA0 Higher January 2015 Paper 3R Q12
12 Here are the marks scored in a test by the girls in class 8C.
2 8 10 12 15 16 16 17 18 19 20
(a) Work out the interquartile range of the girls’ marks. (2)
The boys in class 8C did the same test.
The boys’ marks had a range of 19 and an interquartile range of 11 marks.
Gareth says that the girls’ marks are more spread out than the boys’ marks.
(b) Is Gareth right?
Tick (✓) the appropriate box.
Yes ☐ No ☐
Give a reason for your answer. (1)
Tick (✓) the appropriate box.
Yes ☐ No ☐
Give a reason for your answer. (1)
| Scheme | Marks |
|---|---|
| 18 – 10 | M1 |
| 8 | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| B1 | |
| (1) | |
| (3 marks) |
Notes
B1: ft from (a)Eg. No as the range and/or iqr for the boys is greater than the same measure for the girls