Edexcel A Level Statistics 1 (S1) Past Papers
GradeMax provides comprehensive A Level Statistics 1 revision with real past paper questions organized by topic. Practice probability, data representation, correlation, regression, and discrete random variables.
12 years of papers (2014–2025) · 5 topics · Mark schemes included · Free download
A Level Statistics 1 (S1) Topics
Practice topic-wise Edexcel A Level Statistics 1 (S1) past paper questions with mark schemes
Data Representation
Histograms, stem and leaf diagrams, box plots, and cumulative frequency.
Measures of Location and Spread
Mean, median, mode, range, IQR, variance, and standard deviation.
Probability
Addition and multiplication rules, conditional probability, and tree diagrams.
Correlation and Regression
Scatter diagrams, correlation coefficient, and linear regression lines.
Discrete Random Variables
Probability distributions, expected value (E(X)), and variance (Var(X)).
A Level Statistics 1 (S1) Past Papers by Year
A Level Statistics 1 (S1) — Frequently Asked Questions
What is the formula for standard deviation?
Standard deviation σ = √[Σ(x-μ)²/n] or σ = √[Σx²/n - (Σx/n)²]. For sample standard deviation, use (n-1) in the denominator instead of n.
How do you calculate correlation coefficient?
PMCC (r) = Sxy/√(Sxx × Syy), where Sxy = Σxy - (ΣxΣy)/n, Sxx = Σx² - (Σx)²/n, Syy = Σy² - (Σy)²/n. r ranges from -1 to +1.
What's the difference between correlation and regression?
Correlation measures the strength of linear relationship between two variables (-1 to +1). Regression finds the equation of the line of best fit to predict y from x (y = a + bx).
How do you find E(X) and Var(X)?
E(X) = Σx×P(X=x) (sum of each value times its probability). Var(X) = E(X²) - [E(X)]² = Σx²×P(X=x) - [E(X)]².
When do you use P(A∩B) vs P(A∪B)?
P(A∩B) = probability of A AND B both happening. P(A∪B) = probability of A OR B (or both). P(A∪B) = P(A) + P(B) - P(A∩B).