The discrete random variable X∼B(16,0.50)X \sim B(16, 0.50)X∼B(16,0.50)
Find P(2<X≤6)P(2 < X \leq 6)P(2<X≤6)
Previous research by a restaurant found that 20% of customers will order a starter.
On one day a random sample of 28 customers is taken and 2 order a starter.
Test at the 4% significance level whether the proportion of customers ordering a starter has decreased.
State the conclusion you would have reached if you tested at the 8% 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.