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Created page with "{{a|stats|}}Selection bias occurs when ones ''sample'' is not representative of the ''population'', leading to skewed or biased results. May arise from n A political prediction based on anecdotal sampling of the members of a Golf Club (or for that matter a Working Men’s Club) — who are likely to share political opinions — suffers from selection bias. Non-random sampling methods, exclusion of certain groups, or self-selection by participants. {{sa}} *Lucy Letby..."