Sampling and data collection

3 quick checks≈2% of the testFoundational

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By the end you’ll be able to

Define population, sample, sampling unit and sampling frame using correct statistical terminology.
Identify and apply simple random sampling, systematic sampling, stratified sampling, quota sampling and opportunity or convenience sampling in context.
Calculate the number selected from each stratum for a stratified sample, including proportional allocation.

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Evaluate the advantages and disadvantages of different sampling and data-collection methods for a stated investigation.

Design or improve a questionnaire or statistical study so that data collected are relevant, representative and suitable for analysis.

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