CAIE A-Level Mathematics A2 6.4.2 Sampling Methods Questions
Practise selecting random samples and evaluating sampling methods for bias and suitability.
- Syllabus
- 2028–2030
- Course
- Mathematics 9709
- Level
- A2
Exam points
- use random numbers to select a simple random sample
- identify unsuitable or biased sampling methods
- explain why a sample is representative and appropriate
CAIE A-Level Mathematics A2 6.4.2 Sampling Methods Questions question 1
[Maximum number: 1]
At a certain large school it was found that the proportion of students not wearing correct uniform was 0.15 . The school sent a letter to parents asking them to ensure that their children wear the correct uniform. The school now wishes to test whether the proportion not wearing correct uniform has been reduced.
It is suggested that a random sample of the students in Grade 12 should be used for the test.
Give a reason why this would not be an appropriate sample.
A suitable sample of 50 students is selected and the number not wearing correct uniform is noted. This figure is used to carry out a test at the 5\% significance level.
Not representative (of all students in the school)
OE idea of 'not being representative' e.g. different grades in the school have different characteristics/proportions....
Don't accept 'not random' or 'biased' without further explanation.
All question bank results loaded