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The Normal Distribution

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Question 79
a.

The heights of a group of people are normally distributed with a mean of 160 cm and 20% of the people have a height of less than 152 cm.

Find the value of z z\,z corresponding to a height of 152 cm.

[1]
b.

Hence find the standard deviation of the heights of the people.

[3]
Markscheme

The Normal Distribution Questions

  1. A Level
  2. /Maths
  3. /The Normal Distribution

616 exam-style questions on Edexcel A Level Maths The Normal Distribution, covering 3.1 The Normal Distribution, 3.2 Finding Probabilities for Normal Distributions, 3.3 The Inverse Normal Distribution Function, 3.4 The Standard Normal Distribution, 3.5 Finding the mean and standard deviation, 3.6 Approximating a Binomial Distribution, and 3.7 Hypothesis Testing with the Normal Distribution. Each one has a worked solution and a mark scheme showing where the marks go.

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