Mathematics (AS & A Level) · May / June 2019 · Paper 71 · Question 2
9709
As printed in the paper
The question as text
The time, in minutes, that John takes to travel to work has a normal distribution. Last year the mean and standard deviation were 26.5 and 4.8 respectively. This year John uses a different route and he finds that the mean time for his first 150 journeys is 27.5 minutes.
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2(i)[6]
2(ii)[1]
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