4MA0 Foundation January 2013 Paper 1 Q8
8 10 students took a maths test.
Here are their scores.
25 37 22 19 37 43 30 15 34 36
(a) Work out the range. (2)
(b) Work out the median. (2)
(c) Later, the score of 15 was changed to 18
(i) Will the median increase, decrease or stay the same?
(ii) Give a reason for your answer.
(2)| Scheme | Marks |
|---|---|
| 43 – 15 | M1 |
| 28 | A1 |
| (2) |
Notes
M1: or 43 and 15 isolated
| Scheme | Marks |
|---|---|
| original 10 numbers in correct order (ascending or descending order and can be seen in any part of the question) | M1 |
| 32 | A1 |
| (2) |
Notes
M1: or 30 and 34 isolated
| Scheme | Marks |
|---|---|
| (i) Stay the same | B1 |
| (ii) middle two numbers are the same / order is the same / 18 is the smallest number / correct new order stated | B1 |
| (2) |
Notes
B1: dependent on ci correct