SOLUTION: Commute times (amounts of time it takes people to commute from home to work) of people in a small town are normally distributed with a mean of 35 minutes and a standard deviation o

Question 1190921: Commute times (amounts of time it takes people to commute from home to work) of people in a small town are normally distributed with a mean of 35 minutes and a standard deviation of 9.7 minutes.
Find the z-score that corressponds to the 90 th percentile. Round your answer to two decimal places.

Find the commute time in the normal distribution above that corressponds to the 90 th percentile. Round your answer to one decimal place.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z(0.90)=1.28
z*sigma=(x-mean)
12.42=(x-35)
x=47.42 min or 47.4 minutes
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