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2.4 N: Statistical distributions

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Question 65

Given that X∼N(20,25)X \sim N(20, 25)X∼N(20,25), find the following probabilities. Give each answer to 3 significant figures.

a.

P(X>25)P(X > 25)P(X>25)

[1]
b.

P(X<14.8)P(X < 14.8)P(X<14.8)

[1]
c.

P(13<X<19)P(13 < X < 19)P(13<X<19)

[1]
Markscheme

2.4 N: Statistical distributions Questions

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

390 exam-style questions on AQA A Level Maths 2.4 N: Statistical distributions, covering 2.4.1 Discrete distributions and the binomial, 2.4.2 The Normal distribution (A-level only), and 2.4.3 Selecting an appropriate distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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