Andy plays tennis. The probability that Andy will get one of his serves in court is 50%.
Andy's coach thinks that the probability of Andy getting a serve in court has changed. Andy serves 20 times in a set and 14 are in court. Stating your hypothesis clearly, test the coach's claim at the 10% significance level.
153 exam-style questions on Edexcel A Level Maths Hypothesis Testing, covering 7.1 Hypothesis Testing, 7.2 Finding Critical Values, 7.3 One-Tailed Tests, and 7.4 Two-Tailed Tests. Each one has a worked solution and a mark scheme showing where the marks go.