1MA0 Higher March 2013 Paper 1 Q3
3 Paula wants to find out how much money people spend buying CDs.
She uses this question on a questionnaire.
(a) Write down two things wrong with this question. (2)
Paula asks 100 people in a CD store to do her questionnaire.
(b) Her sample is biased.
Explain why. (1)
Explain why. (1)
| Answer | Mark | Notes |
|---|---|---|
| 2 reasons | 2 | B2 for 2 different reasons from given examples (B1 for 1 reason from given examples) eg No time frame eg No box for less than £10 accept no box for zero or none or £0 eg Overlapping intervals or boxes or £30 and/ or £50 in two boxes |
| Answer | Mark | Notes |
|---|---|---|
| 1 reason | 1 | C1 for reason why the sample is biased eg • they are only in the CD store, • the people in the store are more likely to buy CDs • she needs to ask people outside the store oe |