A Quality Analyst Wants to Construct a Control Chart for Determining

Multiple Choice

A Quality Analyst wants to construct a control chart for determining whether four machines,all producing the same product,are under control with regard to a particular quality attribute.Accordingly,she inspected 1,000 units of output from each machine in random samples,with the following results: If upper and lower control limits were set as 0.028 and 0.010,which machine(s) ,if any,appear(s) to be out-of-control for process proportion of defectives?

A) Machine #3 only
B) Machine #4 only
C) Machines #3 and #4
D) Machines #2 and #3