Mathematics (AS & A Level) · Oct / Nov 2017 · Paper 71 · Question 4
9709
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The question as text
The lengths, in millimetres, of rods produced by a machine are normally distributed with mean - and standard deviation 0.9. A random sample of 75 rods produced by the machine has mean length 300.1 mm.
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4(i)[3]
4(ii)[1]
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