单选题：Statistical quality assurance involves __.
Statistical quality assurance involves __. @[C](1)
A. using sampling in place of exhaustive testing of software
B. surveying customers to find out their opinions about product quality
C. tracing each defect to its underlying cause, isolating the "vital few" causes, and moving to correct them
D. tracing each defect to its underlying causes and using the Pareto principle to correct each problem found
A.using sampling in place of exhaustive testing of software
B.surveying customers to find out their opinions about product quality
C.tracing each defect to its underlying cause, isolating the "vital few" causes, and moving to correct them
D.tracing each defect to its underlying causes and using the Pareto principle to correct each problem found
答案：C
A. using sampling in place of exhaustive testing of software
B. surveying customers to find out their opinions about product quality
C. tracing each defect to its underlying cause, isolating the "vital few" causes, and moving to correct them
D. tracing each defect to its underlying causes and using the Pareto principle to correct each problem found
A.using sampling in place of exhaustive testing of software
B.surveying customers to find out their opinions about product quality
C.tracing each defect to its underlying cause, isolating the "vital few" causes, and moving to correct them
D.tracing each defect to its underlying causes and using the Pareto principle to correct each problem found
答案：C