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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 75

Parcel masses are modelled by X∼N(2.2,0.32)X\sim N(2.2,0.3^2)X∼N(2.2,0.32). The lightest 80% are delivered by bicycle and the rest by car.

a.

Find the greatest mass delivered by bicycle.

[3]
b.

Given that a parcel is delivered by car, find the probability that its mass is less than 3 kg.

[4]
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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