Delivery service. A company must decide which of two delivery services they will contract with. During a recent trial period, they shipped numerous packages with each service and have kept track of how often deliveries did not arrive on time. Here are the data.

a) Compare the two services’ overall percentage of late deliveries.

b) Based on the results in part

a, the company has decided to hire Pack Rats. Do you agree they deliver on time more often? Why or why not? Be specific.

c) The results here are an instance of what phenomenon?

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Delivery Service Type of Service Number of Deliveries Number of Late Packages Pack Rats Regular 400 Overnight 100 Boxes R Us Regular Overnight 100 400 2628 12 16 28