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4.2.2 Statistical distributions (A-level only)

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Question 12

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]

4.2.2 Statistical distributions (A-level only) Questions

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