Higher June 2019 Unit 2 Q4
4. Look at the following set of four numbers.
5 8 10 13
Find another set of four numbers so that:
- the range has increased by 2,
- the mean remains the same,
- the median has decreased by 1.
You may use some of the numbers from the original set, but not exactly the same four numbers. [3]
My four numbers are ☐ ☐ ☐ ☐
| Scheme | Marks | Comments |
|---|---|---|
| Four numbers with a range of 10. | B1 | B0 if all four original numbers used. |
| Four numbers with a total of 36. | B1 | |
| Four numbers with a median of 8. Possible answers for all three marks are 5,5,11,15 or 5,6,10,15 or 5,7,9,15 or 5,8,8,15 | B1 |