Running Times for 400 Meters Are Normally Distributed for Young

Multiple Choice

Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age, with a mean of 93 seconds and a standard deviation of 16 seconds. Thus, 99.7% of running times are approximately between:

A) 45 and 141 seconds.
B) 61 and 125 seconds.
C) 77 and 109 seconds.
D) None of the answer options is correct.