A-LevelMathematicsProbability and statisticsOct/Nov 2022Paper 6 Q48 Marks
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 30 m² of cloth is checked and the number of faults is found.
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