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4.5 Statistical distributions (A-level only)

4.5 Statistical distributions (A-level only)

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Question 152

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

4.5 Statistical distributions (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.5 Statistical distributions (A-level only)

284 exam-style questions on CCEA A Level Maths 4.5 Statistical distributions (A-level only), covering 4.5.1 Statistical distributions (A-level only) and 4.5.2 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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