A company packs jars of sauce. The probability that any jar has a damaged lid is 0.20.
A sample of 8 jars is taken. Find the probability that 2 or more jars have damaged lids.
A supervisor claims that the probability that a jar has a damaged lid is more than 0.20. They take a sample of 10 jars and 5 have damaged lids. Stating your hypothesis clearly, test the supervisor's claim at the 5% significance level.
33 exam-style questions on Edexcel AS 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.