Leila runs a website. The probability that a visitor who sees an advert clicks on it is 30%.
The advert is shown to 20 visitors. Find the probability that exactly 5 visitors click on the advert.
The advert is shown to 20 visitors. Find the probability that more than 5 visitors click on the advert.
Leila thinks that the probability of a visitor clicking on the advert has changed. The advert is shown to 20 visitors on a particular day and 11 click on it. Stating your hypothesis clearly, test Leila's claim at the 10% 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.