A-LevelMathematicsProbability and statisticsOct/Nov 2020Paper 6 Q48 Marks
The areas, X cm², of petals of a certain kind of flower have mean µ cm². In the past it has been found that μ = 8.9. Following a change in the climate, a botanist claims that the mean is no longer 8.9. The areas of a random sample of 200 petals from this kind of flower are measured, and the results are summarized by Σx = 1850, Σx² = 17 850.
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