The headteacher of a school wants to investigate opinions of pupils about meals sold in the canteen. She asks the first 20 peopl

Question

3 years ago

15

The headteacher of a school wants to investigate opinions of pupils about meals sold in the canteen. She asks the first 20 peopl

e in the dinner queue their opinions.
Explain why this is not a satisfactory method of selecting a sample of pupils.
Describe how the headteacher could select a random sample of 20 students.

Mathematics

2 answers:

Lana71 [14] · Answer 1 · 2022-09-07T07:38:53+03:00

That is not a satisfactory sample because the results could be biased or viewed in a different way because maybe all 20 student the teacher chose may have a certain opinion. A good way to select random students is to maybe get some papers with all the student names and mix them all up in a bowl and then pick some random papers.

anygoal [31] · Answer 2 · 2022-09-07T09:22:48+03:00

anygoal [31]3 years ago

7 0

The people who are in the front of the queue are the people most likely to like the food