You are not currently logged in. Please create an account or log in to view the full course. Classic View Psychology A Level Edexcel A Level Psychology (9PS0) Psychological Skills 9.1 Methods 9.1.11 Inferential Statistics Observed and Critical Values Classic View Observed and Critical Values STATISTICS FOR PSYCHOLOGISTS – INFERENTIAL STATISTICS Probability, Critical Values and Significance Dr Alison Wadeley, Bath Spa University