Question

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distribution in which 75.8% of the college students exceed when trying to find a parking spot in the library parking lot.

A. 2.8 minutes
B. 3.2 minutes
C. 3.4 minutes
D. 4.2 minutes

Answer 1

Without that site, you can still figure it out.

Z = (x - mean)/standard deviation

In the back of your text, there is a table labeled something like "areas under normal distribution." Find that percentage in the table to determine your Z score. Put the values in the above equation and solve.

I hope this helps a little more.