Speedy Swift is a package delivery service that serves the greater Atlanta, Georgia met- ropolitan area. To maintain customer loyalty, one of Speedy Swift's performance objec- tives is on-time delivery. To monitor its performance, each delivery is measured on the following scale: early (package delivered before the promised time), on-time (package delivered within 5 minutes of the promised time), late (package delivered more than 5 minutes past the promised time), lost (package never delivered). Speedy Swift's objective is to deliver 99 percent of all packages either early or on-time. Another objective is to never lose a package.
Speedy collected the following data for last month's performance:
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On-time
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On-time
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Early
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Late
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On-time
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On-time
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On-time
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On-time
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Late
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On-time
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Early
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On-time
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On-time
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Early
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On-time
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On-time
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On-time
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On-time
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On-time
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On-time
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Early
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On-time
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Early
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On-time
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On-time
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On-time
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Early
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On-time
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On-time
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On-time
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Early
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On-time
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On-time
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Late
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Early
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Early
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On-time
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On-time
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On-time
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Early
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On-time
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Late
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Late
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On-time
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On-time
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On-time
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On-time
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On-time
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On-time
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On-time
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On-time
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Late
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Early
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On-time
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Early
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On-time
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Lost
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On-time
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On-time
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On-time
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Early
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Early
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On-time
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On-time
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Late
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Early
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Lost
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On-time
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On-time
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On-time
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On-time
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On-time
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Early
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On-time
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Early
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On-time
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Early
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On-time
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Late
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On-time
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On-time
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Early
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On-time
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On-time
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On-time
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Late
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On-time
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Early
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On-time
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On-time
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On-time
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On-time
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On-time
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On-time
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On-time
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Early
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Early
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On-time
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On-time
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On-time
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a. What scale is used to measure delivery performance? What kind of variable is delivery performance?
b. Construct a frequency table for delivery performance for last month.
c. Construct a relative frequency table for delivery performance last month.
d. Construct a bar chart of the frequency table for delivery performance for last month.
e. Construct a pie chart of on-time delivery performance for last month.
f. Analyze the data summaries and write an evaluation of last month's delivery perfor- mance as it relates to Speedy Swift's performance objectives. Write a general recom- mendation for further analysis.