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Hypothesis Testing

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Question 10

The discrete random variable X∼B(15,0.20)X \sim B(15, 0.20)X∼B(15,0.20)

a.

Find P(0<X≤3)P(0 < X \leq 3)P(0<X≤3)

[2]
b.

Previous research by a restaurant found that 20% of customers will order a starter.
On one day a random sample of 20 customers is taken and 1 orders a starter.

Test at the 5% significance level whether the proportion of customers ordering a starter has decreased.

[5]
c.

State the conclusion you would have reached if you tested at the 10% significance level.

[1]
Markscheme

Hypothesis Testing Questions

  1. A Level
  2. /Maths
  3. /Hypothesis Testing

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.

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