SOLUTION: The length of time it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of 4 minutes and a standard deviation of 3 minutes. Sixty percent of the

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Question 1050115: The length of time it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of 4 minutes and a standard deviation of 3 minutes.
Sixty percent of the time, it takes more than how many minutes to find a parking space?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
z+=blue+%28x+-+mu%29%2Fblue%28sigma%29
z = invNorm(.60) = .2533
blue%28sigma%29%2Az+%2B+mu = x
.2533(3) + 4 = x = 4.7599 = 5min (rounding Up to nearest min)
Takes more than 5 min to find a parking space.