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4.2 Statistical distributions (A-level only)

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Question 45

Given that X∼N(20,25)X\sim N(20,25)X∼N(20,25), find

a.

P(X<23)P(X<23)P(X<23),

[2]
b.

P(X>17)P(X>17)P(X>17),

[2]
c.

P(17<X<23)P(17<X<23)P(17<X<23).

[2]
Markscheme

4.2 Statistical distributions (A-level only) Questions

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

324 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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