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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 27

The amount W W\,W ml placed in a bottle is normally distributed with mean 500 ml. It is known that P(W>504)=0.30P(W>504)=0.30P(W>504)=0.30.

a.

Find the standard deviation of WWW.

[4]
b.

Find P(W<490)P(W<490)P(W<490).

[2]
c.

Comment on whether the model permits physically impossible values.

[1]
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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