Mathematics
linareymmo
25

The ages of the 32 recruits in police academy are normally distributed with a mean of 27 with a standard deviation of 2. What percent of the recruits are between ages 23 and 27?

+2
(1) Answers
Winkey180

z scores are   (age - mean) / std dev = 23 - 27 / 2  = -2  and  27-27 / 2  = 0  Using the standard normal tables we find the required percentage is 47.73%                 

Add answer