SOLUTION: When we were able to offer ‘in person’ classes, a student had computed that it takes an average of 17 minutes with a standard deviation of 3 minutes to drive from home, park th

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Question 1165424: When we were able to offer ‘in person’ classes, a student had computed that it takes an average of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to an early morning class.
a) One day it took the student 21 minutes to get to class. What is the z-value corresponding to the 21 minutes?
b) On another day it took the student 17 minutes to get to class. What would the z-score be?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
so for the first, z=(21-17)/3
z=4/3
the second one is z=0.