The discrete random variable X∼B(20,0.41)X \sim B(20, 0.41)X∼B(20,0.41)
Find P(3<X≤7)P(3 < X \leq 7)P(3<X≤7)
Previous research by a restaurant found that 30% of customers will order a starter.
On one day a random sample of 40 customers is taken and 7 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.
Practise Edexcel A Level Maths Hypothesis Testing with exam-style questions for A Level Maths. 8 questions covering 7.1 Hypothesis Testing, 7.2 Finding Critical Values, 7.3 One-Tailed Tests, and 7.4 Two-Tailed Tests, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
