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2.4 Statistical distributions

2.4 Statistical distributions

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Question 20

A manufacturer claims that 15% of its batteries fail before 500 cycles. A laboratory tests 40 batteries and models the number N N\,N of early failures as binomial.

a.

State the distribution used under the claim.

[1]
b.

Find P(N=4)P(N=4)P(N=4).

[2]
c.

State two assumptions about the testing needed for the model.

[2]
Markscheme

2.4 Statistical distributions Questions

  1. A Level
  2. /Maths
  3. /2.4 Statistical distributions

47 exam-style questions on WJEC A Level Maths 2.4 Statistical distributions, covering 2.4.1 Statistical distributions, 2.4.2 Statistical distributions, and 2.4.3 Statistical distributions. Each one has a worked solution and a mark scheme showing where the marks go.

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