Statistical Enquiry Cycle Data Collection
Data collection involves: (1) designing unbiased primary data collection methods, (2) researching secondary data sources including publications and internet sources, (3) declaring data collection methodology and sources, and (4) appreciating inherent biases from leading questions or agenda-driven design.
Real World
A student replicating a Which? consumer survey must critically assess whether the original survey used leading questions or a biased sample before treating its secondary data as reliable.
Exam Focus
When critiquing data collection, name the specific bias (e.g. response bias, leading question) — vague answers lose marks.
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