A nationwide parcel delivery service keeps track of the number of late deliveries (more than 30 minutes past the time promised to clients) per day. They plan on using a control chart to plot their results. Which type of control chart(s) would you recommend?

A c-chart is a statistical process chart that is used to control the number of defects per unit of output. The attributes of the output units are collected in subgroups (of the same size). The c-charts show the number of defects (or nonconformities) per subgroup, and how their number changes over time.

In this case the nonconformities or defects would be the late deliveries.

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A nationwide parcel delivery service keeps track of the number of late deliveries​ (more than 30 minutes past the time promised to​ clients) per day. They plan on using a control chart to plot their results. Which type of control​ chart(s) would you​ recommend?

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A nationwide parcel delivery service keeps track of the number of late deliveries (more than 30 minutes past the time promised to clients) per day. They plan on using a control chart to plot their results. Which type of control chart(s) would you recommend?