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2.4.2 The Normal distribution (A-level only)

2.4.2 The Normal distribution (A-level only)

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Question 114

The mass of coffee in a jar, in grams, is modelled by a Normal distribution with mean 200 g and standard deviation 4.2 g.

a.

Find the probability that the mass of coffee in a randomly chosen jar is more than 205 g. Give your answer to 3 significant figures.

[1]
b.

Find the probability that the mass of coffee in a randomly chosen jar is between 195 g and 205 g. Give your answer to 3 significant figures.

[1]
c.

The manufacturer states that no jar contains a negative mass of coffee. Explain why this does not make the Normal model unreasonable here.

[1]
Markscheme

2.4.2 The Normal distribution (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.4.2 The Normal distribution (A-level only)

351 exam-style questions on AQA A Level Maths 2.4.2 The Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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