It takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model.
(a) Determine the z values for 29 and 34 hours.
(b) What percent of the garages take between 29 hours and 34 hours to erect?
(c) What percent of the garages take between 32 hours and 34 hours to erect?