Question

at one high school the mean time for running the 100-yard dash is 15.2 seconds with a standard deviation of 0.9 seconds. The times are very close approximated by a normal curve. Find the percent of times that are:
between 15.2 and 16.1 seconds

Answer 1

I suggest you learn how to use (Broken Link Removed) or tables of the Gaussian error funtion.

The answer that I get using the computational tool at that site is 34.1%