The chance of a webpage visitor clicking on a link is 0.5. Angela believes that increasing the font size for the link will increase the proportion of visitors that click on the link.
After increasing the font size a sample of 12 visitors is taken and 10 clicked on the link.
Stating your hypotheses clearly and giving the probability used in your test as an exact fraction, test, at the 5% level of significance, whether or not there is evidence to support Angela's belief.
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.