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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 59

A company models the time T T\,T minutes between 0 and 20 minutes at which a customer arrives after a shop opens as T∼U(0,20)T\sim U(0,20)T∼U(0,20). Records show that arrivals are much more common just before employees begin work at nearby offices.

a.

Explain why the continuous uniform model is unsuitable.

[2]
b.

A colleague proposes a Normal model with mean 10 minutes. Give one advantage and one limitation of this proposal.

[2]
Markscheme

4.2 Statistical distributions (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.2 Statistical distributions (A-level only)

328 exam-style questions on WJEC A Level Maths 4.2 Statistical distributions (A-level only), covering 4.2.1 Statistical distributions (A-level only), 4.2.2 Statistical distributions (A-level only), and 4.2.3 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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