The discrete random variable X∼B(22,0.50)X \sim B(22, 0.50)X∼B(22,0.50)
Find P(4<X≤10)P(4 < X \leq 10)P(4<X≤10)
Previous research by a restaurant found that 40% of customers will order a starter.
On one day a random sample of 25 customers is taken and 6 order a starter.
Test at the 5% significance level whether the proportion of customers ordering a starter has decreased.
State the conclusion you would have reached if you tested at the 10% significance level.
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.