Mathematics (AS & A Level) · Oct / Nov 2022 · Paper 62 · Question 4
9709
As printed in the paper
The question as text
The number of faults in cloth made on a certain machine has a Poisson distribution with mean 2.4 per 10m2. An adjustment is made to the machine. It is required to test at the 5% significance level whether the mean number of faults has decreased. A randomly selected 30m2 of cloth is checked and the number of faults is found.
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4(a)[1]
4(b)[3]
4(c)[2]
4(d)[2]
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