Foundation November 2017 Paper 2 Q12
12 Jack carries out a survey in his school.
He selects 50 students, at random, and asks them
Do you think that it is a good idea to have women-only railway carriages?
These are his results.
| Number of students | |
|---|---|
| Yes | 32 |
| No | 13 |
| Don’t know | 5 |
(a) What percentage of the students in Jack’s survey answered ‘Yes’? [3]
(b) Jack says
My survey shows that people in England think that it is a good idea to have women-only railway carriages.
Explain why Jack may be wrong. [1]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 64 | 3 | B2 for \(\dfrac{64}{100}\) or B1 for \(\dfrac{32}{50}\) or M1 for 32 \(\div\) 50 \(\times\) 100 oe | |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Valid explanation | 1 | Such as ‘the sample size was too small’ | See Appendix |
Appendix
Exemplar responses for Q12b
| Response | Mark |
|---|---|
| The sample was not representative | 1 |
| The question was biased | 1 |
| The question is leading | 1 |
| Because it doesn’t say on the survey where they are from | 1 |
| Because he only asked 50 people in his school | 1 |
| Because it is for his school not England | 1 |
| Because Jack only carried out his survey in school so the range isn’t big enough for the whole of England | 1 |
| Because he asked 50 students meaning he didn’t ask any adults or older people which decisions may be the opposite to what the students have said | 1 |
| He selected 50 students at random meaning more of one gender could have been asked than the other | 1 |
| He didn’t ask the whole of England he only asked his mates (This is implying using the whole population not using sampling) | 0 |
| Because he hasn’t asked the majority of the public, which he needs to ask | 0 |
| Not everyone said yes | 0 |