The discrete random variable X∼B(10,0.5)X \sim B(10, 0.5)X∼B(10,0.5)
Find P(X≥3)P(X \geq 3)P(X≥3)
A cinema expects 50% of customers to buy popcorn. On one particular evening, a random sample of 20 customers is taken and 15 of them buy popcorn. Test at the 1% significance level whether the proportion of customers buying popcorn has increased. State your hypotheses clearly.
State the conclusion you would have reached if a 5% significance level had been used for this test.
32 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.