Question 1088425
z for 0.94 or 94th percentile is +1.555.
228 minutes is mean
59 minutes is sd
z=(x-mean)/sd
1.555=(x-228)/59
91.745=x-228
x=319.75 minutes or 5h19.75m
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16% is z=-0.95
-0.96=(x-228)/59
-56.64=x-228
x=171.36 minutes of 2h51.36m
Friday, people probably arrive later if they have been working.