A Delivery Company Defines a "Defect" as a Package Delivered

Multiple Choice

A delivery company defines a "defect" as a package delivered later than the promised delivery time.Management wants to monitor the proportion of packages per week delivered beyond their promised delivery time.Management plans to sample 150 packages per week.The appropriate control chart is a(n) :

A) -chart.
B) R-chart.
C) p-chart.
D) np-chart.