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, $$\(z\)$$, and finds that $$\(z=2.41\)$$. Explain briefly whether he should use a one-tail test or a two-tail test. .................................................................................................................................................... .................................................................................................................................................... ....................................................................................................................................................

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