4. A normal population has a mean of 12.2 and a standard deviation of 2.5.
a. Compute the z value associated with 14.3.
b. What proportion of the population is between 12.2 and 14.3?
c. What proportion of the population is less than 10.0?
5. A recent study of the hourly wages of maintenance crew members for majo
600 50
ndard deviation
