SOLUTION: The time required to finish a test in normally distributed with a mean of 80 minutes and a standard deviation of 15 minutes. What is the probability that a student chosen at random
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Question 1132082: The time required to finish a test in normally distributed with a mean of 80 minutes and a standard deviation of 15 minutes. What is the probability that a student chosen at random will finish the test in more than 95 minutes Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=(x-mean)/sd
>=(95-80)/15
=+1
z > +1 is 0.1587
(+1 is 0.1587 on the standard normal distribution which means that the area beyond that is 0.1587 of the area.)
