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EnglandMaths

Statistics

6 dot points across 6 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do you summarise, display and interpret data, and how do you measure how two variables are related?

Measures of location and spread, diagrams for single and bivariate data, outliers and cleaning, correlation and the equation of a regression line, and interpolation versus extrapolation.
A focused answer to the Edexcel A-Level Mathematics data presentation and interpretation content, covering measures of location and spread, histograms and box plots, outliers and cleaning, correlation, the regression line, and interpolation versus extrapolation.
10 min answer →

How do you use sample evidence to decide whether to accept or reject a claim about a population?

Null and alternative hypotheses, one- and two-tailed tests, significance levels and critical regions, hypothesis tests for a binomial proportion, and for a correlation coefficient and a normal mean.
A focused answer to the Edexcel A-Level Mathematics hypothesis testing content, covering null and alternative hypotheses, one- and two-tailed tests, significance levels and critical regions, tests for a binomial proportion, the correlation coefficient and the mean of a normal distribution.
11 min answer →

How do you measure the chance of events, and how do you combine probabilities of related events?

Probability of events, mutually exclusive and independent events, the addition and multiplication laws, conditional probability, and Venn and tree diagrams.
A focused answer to the Edexcel A-Level Mathematics probability content, covering the probability of events, mutually exclusive and independent events, the addition and multiplication laws, conditional probability, and the use of Venn and tree diagrams.
9 min answer →

How do you model a discrete random variable, and when is the binomial distribution the right model?

Discrete random variables and probability distributions, the binomial distribution, its conditions, and calculating binomial probabilities with technology.
A focused answer to the Edexcel A-Level Mathematics statistical distributions content, covering discrete random variables and probability distributions, the binomial distribution and its conditions, and calculating binomial probabilities using the formula and a calculator.
9 min answer →

How do you select a representative sample from a population, and what are the trade-offs of each method?

Populations and samples, census and sampling, random and non-random sampling methods, and the advantages and limitations of each in context.
A focused answer to the Edexcel A-Level Mathematics statistical sampling content, covering populations and samples, the difference between a census and a sample, random and non-random sampling methods, and the advantages and limitations of each in context.
8 min answer →

How do you model continuous data with the normal distribution, and how do you find probabilities and unknown parameters?

The normal distribution as a model for continuous data, finding probabilities, the standard normal distribution, using the inverse normal, and approximating the binomial.
A focused answer to the Edexcel A-Level Mathematics normal distribution content, covering the normal distribution as a model for continuous data, finding probabilities, standardising, the inverse normal for unknown parameters, and the normal approximation to the binomial.
10 min answer →