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AS 2 Applied Mathematics
Quick questions on Statistical sampling: populations, samples and sampling methods - CCEA A-Level Mathematics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are non-random methods?Show answer
In quota sampling the interviewer fills set numbers from each group but chooses individuals non-randomly, which is quick but can be biased. In opportunity (convenience) sampling you take whoever is available, which is easy but the least representative. Each method trades effort against the risk of bias.
What is q1?Show answer
Define a census. [1 mark]
What is q2?Show answer
A population of is sampled with size by stratified sampling. A stratum has members. How many are sampled from it?
What is q3?Show answer
Give one disadvantage of opportunity sampling. [1 mark]
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