A-LevelMathematicsProbability and statisticsFeb/Mar 2021Paper 6 Q34 Marks
An architect wishes to investigate whether the buildings in a certain city are higher, on average, than buildings in other cities. He takes a large random sample of buildings from the city and finds the mean height of the buildings in the sample. He calculates the value of the test statistic, z, and finds that z = 2.41.
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