Descriptive Statistics
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Chapter 1, Exercise 2, p 14
What is the level of measurement for these items related to the newspaper business?
a. The number of papers sold each Sunday during 2004.
b. The departments, such as editorial, advertising, sports, etc.
c. A summary of the number of papers sold by county.
d. The number of years with the paper for each employee.
Chapter 2, Exercise 31, p 49
31. A recent survey showed that the typical American car owner spends $2,950 per year on operating expenses. Below is a breakdown of the various expenditure items. Draw an appropriate chart to portray the data and summarize your findings in a brief report.
Expenditure Item Amount
Fuel $ 603
Interest on car loan 279
Repairs 930
Insurance and license 646
Depreciation 492
Total $2,950
Chapter 3, Exercise 17, p 65
For Exercises 16-19, (a) determine the median and (b) the mode.
17. The following is the percent change in net income from 2002 to 2003 for a sample of 12 construction companies in Denver.
5 1 _10 _6 5 12 7 8 2 5 _1 11
Chapter 4, Exercise 13, p108
13. The Thomas Supply Company, Inc. is a distributor of small electrical motors. As with any business, the length of time customers take to pay their invoices is important. Listed below, arranged from smallest to largest, is the time, in days, for a sample of The Thomas Supply Company, Inc. invoices.
13 13 13 20 26 27 31 34 34 34 35 35 36 37 38
41 41 41 45 47 47 47 50 51 53 54 56 62 67 82
a. Determine the first and third quartiles.
b. Determine the second decile and the eighth decile.
c. Determine the 67th percentile.
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Solution Summary
Calculation of quartiles, eighth deciles, 67th percentile, mean, median and mode. Bar diagram of the data is also included.
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