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# 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
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.

https://brainmass.com/statistics/descriptive-statistics/descriptive-statistics-90314

#### Solution Summary

Calculation of quartiles, eighth deciles, 67th percentile, mean, median and mode. Bar diagram of the data is also included.

\$2.19

## Statistics - Descriptive Statistics (Analysis of Variance)

Car Fuel Consumption:

The following table lists highway fuel consumption amounts (in mi/gal) from data Set 22 in Appendix C. Assume that fuel consumption amounts are not affected by an interaction between the type of transmission (manual or automatic) and the number of cylinders. Are fuel consumption amounts affected by the type of transmission? Are fuel consumption amounts affected by the number of cylinders? (Please see the attached file)

Age
under 20 20-40yrs Over 40
Male 96 64 68 60 64 88 72 64 68 72 60 88
Female 76 64 76 68 72 88 72 68 60 68 72 64

Cylinders
4 Cyliners 6 Cylinders 8 Cylinders
Manual 33 30 28
Automatic 31 27 24

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