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Flip to reveal answersName the five sampling techniques.
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All 9 Flashcards — Sampling techniques
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Question
Name the five sampling techniques.
Answer
Simple random, systematic, stratified, quota, convenience.
Question
What is simple random sampling?
Answer
Every member of the population has an equal chance of being chosen (e.g. drawing lots or random numbers).
Question
What is systematic sampling?
Answer
Order the population and take every k-th member after a random start.
Question
How do you find the interval k for systematic sampling?
Answer
k = population size ÷ sample size.
Question
What is stratified sampling?
Answer
Split the population into groups (strata) and sample each in proportion to its size.
Question
How many do you take from a stratum?
Answer
(group size ÷ population) × sample size.
Question
What is quota sampling?
Answer
Fill fixed numbers from each group, but choose the members non-randomly.
Question
What is convenience sampling?
Answer
Choose whoever is easiest or first available.
Question
Which techniques are most prone to bias, and why?
Answer
Quota and convenience — the members are not chosen randomly, so the sample is often unrepresentative.
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Topic 4.1 hub
Sampling & reliability
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