Population, sample and sampling techniques Quiz
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5 questions, one answer each
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1. A researcher measures 100 trees taken from a forest of 5000 trees. What is the population?
- A. The 100 trees measured
- B. The heights of the trees
- C. The trees in the researcher's survey area
- D. All 5000 trees in the forest
2. A school has 1200 students, of whom 300 are in Year 12. A stratified sample of 80 is taken. How many are from Year 12?
- A. 15
- B. 25
- C. 30
- D. 20
3. A systematic sample of 30 is taken from a numbered list of 600 people. What is the interval?
- A. 20
- B. 30
- C. 10
- D. 570
4. Which of these is a non-random sampling method?
- A. Simple random sampling
- B. Stratified sampling
- C. Quota sampling
- D. Systematic sampling with a random start
5. Which is a disadvantage of opportunity sampling?
- A. It needs a sampling frame
- B. It is likely to be biased
- C. It is slow and costly
- D. Every member has an equal chance