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Mathematics, 01.09.2019 09:00 dondre54

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

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The headteacher of a school wants to investigate opinions of pupils about meals sold in the canteen....
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