Edexcel•A-Level•Mathematics
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Statistical Distributions
Discrete and continuous distributions including binomial and normal
Practice 25 subtopics in Statistical Distributions. All questions match the Edexcel A-Level specification.
About Statistical Distributions
Statistical Distributions is a key topic in the Edexcel A-Level Mathematicsspecification. This topic covers discrete and continuous distributions including binomial and normal.
Master all 25 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (25)
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Discrete random variablesProbability distributions as tablesSum of probabilities equals 1Expected value E(X) = Σx·P(X=x)Variance Var(X) = E(X²) - [E(X)]²Standard deviationBinomial distribution X ~ B(n, p)Conditions for binomialCalculating P(X = r) = ⁿCᵣpʳ(1-p)ⁿ⁻ʳMean E(X) = npVariance Var(X) = np(1-p)Cumulative binomial probabilitiesUsing binomial tables/calculatorNormal distribution X ~ N(μ, σ²)Properties of normal distributionStandard normal Z ~ N(0, 1)Standardising: Z = (X - μ)/σFinding probabilities using normal distributionUsing normal tablesUsing calculator for normal probabilitiesInverse normal: finding x from probabilityFinding μ or σ from given probabilitySelecting appropriate distributionsNormal approximation to binomialContinuity correction
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Start with Discrete random variables