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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