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2.5 Statistical hypothesis testing

2.5 Statistical hypothesis testing

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Question 1
30%

The discrete random variable X∼B(20,0.41)X \sim B(20, 0.41)X∼B(20,0.41)

a.

Find P(3<X≤7)P(3 < X \leq 7)P(3<X≤7)

[2]
b.

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.

[5]
c.

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

[1]
Markscheme

2.5 Statistical hypothesis testing Questions

  1. A Level
  2. /Maths
  3. /2.5 Statistical hypothesis testing

40 exam-style questions on WJEC A Level Maths 2.5 Statistical hypothesis testing, covering 2.5.1 Statistical hypothesis testing, 2.5.2 Statistical hypothesis testing, 2.5.3 Statistical hypothesis testing, 2.5.4 Statistical hypothesis testing, and 2.5 Statistical hypothesis testing. Each one has a worked solution and a mark scheme showing where the marks go.

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