Sampling and proportions — Question 141

Original QCE Vault practice · 1 mark

Q141 · Practice questionTechnology-freeSimple familiar1 mark

QUESTION 141

Which procedure is most likely to produce a random sample of

80

students from a school of

1200

students?

(A)

Survey the first 80 students entering the library.

(B)

Use a random-number generator to select 80 student IDs from the complete enrolment list.

(C)

Survey 80 students from one Year 12 class.

(D)

Post an online survey and use the first 80 responses.

ABCD

Question linkSyllabus coverage

WORKED SOLUTION

Answer B

1 mark

ANSWER

Worked solution

Selecting IDs randomly from the complete sampling frame gives each student a defined random chance of selection and avoids the obvious convenience or voluntary-response biases in the other methods.

Selects the correct option.

[1 mark]

Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.

View the QCAA syllabus

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