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Delivery service A company must decide which of two
Chapter 3, Problem 44E(choose chapter or problem)
Problem 44E
Delivery service A company must decide which of two delivery services it will contract with. During a recent trial period, the company shipped numerous packages with each service and kept track of how often deliveries did not arrive on time. Here are the results:
Delivery Service |
Type of Service |
Number of Deliveries |
Number of Late Packages |
Pack Rats |
Regular Overnight |
400 100 |
12 16 |
Boxes R Us |
Regular Overnight |
100 400 |
2 28 |
a) Compare the two services’ overall percentage of late deliveries.
b) On the basis of the results in part a, the company has decided to hire Pack Rats. Do you agree that Pack Rats delivers on time more often? Explain.
c) The results here are an instance of what phenomenon?
Questions & Answers
QUESTION:
Problem 44E
Delivery service A company must decide which of two delivery services it will contract with. During a recent trial period, the company shipped numerous packages with each service and kept track of how often deliveries did not arrive on time. Here are the results:
Delivery Service |
Type of Service |
Number of Deliveries |
Number of Late Packages |
Pack Rats |
Regular Overnight |
400 100 |
12 16 |
Boxes R Us |
Regular Overnight |
100 400 |
2 28 |
a) Compare the two services’ overall percentage of late deliveries.
b) On the basis of the results in part a, the company has decided to hire Pack Rats. Do you agree that Pack Rats delivers on time more often? Explain.
c) The results here are an instance of what phenomenon?
ANSWER:
Step 1 of 3
a) The percetage is the number of late packages divided by the number of deliveries:
Thus Boxes 