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3.5 Finding the mean and standard deviation

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Question 8

The mass of newborn kittens in a specific breed is normally distributed.

20% of the kittens have a mass of less than 85 grams. 12% of the kittens have a mass of more than 115 grams.

Find the mean and standard deviation of the masses.

[6]
Markscheme

3.5 Finding the mean and standard deviation Questions

  1. A Level
  2. /Maths
  3. /3.5 Finding the mean and standard deviation

48 exam-style questions on Edexcel A Level Maths 3.5 Finding the mean and standard deviation. Each one has a worked solution and a mark scheme showing where the marks go.

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