SOLUTION: For women at Hartford college, times to run 400 meters are normally distributed with a mean of 84 seconds and a standard deviation of 7 seconds. What percentage of the times are mo

Algebra ->  Probability-and-statistics -> SOLUTION: For women at Hartford college, times to run 400 meters are normally distributed with a mean of 84 seconds and a standard deviation of 7 seconds. What percentage of the times are mo      Log On


   

Question 872146: For women at Hartford college, times to run 400 meters are normally distributed with a mean of 84 seconds and a standard deviation of 7 seconds. What percentage of the times are more than 63 seconds
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
z =(63-84)/3 = -21/7 = -3
P(x > 63) = p(z > -3) = .9987 0r 99.87%