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. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No:9709_s21_qp_61 Year:2021 Question No:8(a)
Answer:
Not representative (of all students in the school)
Knowledge points:
6.4.2 explain in simple terms why a given sampling method may be unsatisfactory (Including an elementary understanding of the use of random numbers in producing random samples.) (Knowledge of particular sampling methods, such as quota or stratified sampling, is not required.)
Solution:
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