A technician checked a sample of a 160 portable radios. She found 7 of the radios defective. If more than 5% of the sample is defective, the process is out of control. What is the exact percent of the sample that is defective?
a.4% b.3.98% c.5.76% d.4.23% e.not given
A percentage is calculated. The expert examines the defective process out of control.