The probability that a patient experiences a side effect from a medication is 0.40. Daniel believes that an improved version of the medication will decrease the proportion of patients who experience a side effect.
After introducing the improved version, a sample of 75 patients is taken and 22 experience a side effect.
Stating your hypotheses clearly test, at the 5% level of significance, whether or not there is evidence to support Daniel's belief.
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.