Mathematics (AS & A Level) · Feb / March 2017 · Paper 72 · Question 3
9709
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The length, in centimetres, of a certain type of snake is modelled by the random variable X with mean 52 and standard deviation 6.1. A random sample of 75 snakes is selected, and the sample mean, X, is found.
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3(i)[4]
3(ii)[1]
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