Mathematics (AS & A Level) · May / June 2022 · Paper 62 · Question 4
9709
As printed in the paper
The question as text
The number of cars arriving at a certain road junction on a weekday morning has a Poisson distribution with mean 4.6 per minute. Traffic lights are installed at the junction and a council officer wishes to test at the 2% significance level whether there are now fewer cars arriving. He notes the number of cars arriving during a randomly chosen 2-minute period.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
4(a)[1]
4(b)[4]
4(c)[2]
4(d)[1]
4(e)[3]
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