## Answers

µ = 725

σ = 60

a) Z=(X-µ)/σ= (639-725)/60= -1.43

b) Z=(X-µ)/σ= (861-725)/60= 2.27

c) Z=(X-µ)/σ= (548-725)/60= -2.95

d) Z=(X-µ)/σ= (791-725)/60= 1.10

e) Z=(X-µ)/σ= (914-725)/60= 3.15

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