At a Local Manufacturing Plant, Employees Must Complete New Machine

Multiple Choice

At a local manufacturing plant, employees must complete new machine set ups within 30 minutes. New machine set-up times can be described by a normal model with a mean
Of 22 minutes and a standard deviation of four minutes. The typical worker needs five
Minutes to adjust to his or her surroundings before beginning duties. What percent of
New machine set ups are completed within 25 minutes to allow for this?

A) 77.3%
B) 27.3%
C) 22.7%
D) 72.7%
E) none of the above