Hypothesis Testing

The Year 1 method applied to two new situations: testing for correlation and testing the mean of a normal distribution. These pages cover DfE content area O (statistical hypothesis testing).

• An Overview — a recap of the language of hypothesis testing and how the two new tests fit together

The content statements

• Testing for Correlation — testing ρ = 0 with one- and two-tailed alternatives, using critical values of r or a p-value
• Testing a Normal Mean — using the distribution of the sample mean, N(μ, σ²/n), to test a mean with known σ, with critical regions and p-values

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Each page has step-by-step notes, several worked examples, a quick-reference grid and ten practice questions with fully worked solutions.