Question: explain this formula step by step explain this formula Z = frac{5500- 4700}{500}= frac{800}{500} =1.6, P (Z > 1.6) = 1-P (Z > 1.6) =

explain this formula step by step explain this formula Z = \frac{5500-\ 4700}{500}= \frac{800}{500} =1.6, P (Z > 1.6) = 1-P (Z > 1.6) = 1-0.9452= 0.0548

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