Length of time to find a parking space - Normal Distribution

Oct 2019
27
1
united states
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 2 minutes.

Seventy percent of the time, it takes more than how many minutes to find a parking space? (Round your answer to two decimal places.)

help please
 

Debsta

MHF Helper
Oct 2009
1,278
582
Brisbane
First things first:
Have you drawn a little diagram of a normal distribution, making in the position of the mean and interpreting the sd?
 
Mar 2012
557
29
2.9512 hours = 2.95 hours (rounded) = 2 hours and 57 minutes
 
Oct 2019
27
1
united states
Thanks so much Joshuaa you are very smart