Appendix D:
SelfTest Solutions and Answers
to EvenNumbered Exercises
Chapter 1
2. a.
9
b.
4
c.
Categorical: country and room rate
Quantitative: number of rooms and overall score
d.
Country is nominal; room rate is ordinal; number of
rooms is ratio; overall score is interval
3. a.
Average number of rooms
5
808/9
5
89.78, or approxi
mately 90 rooms
b.
Average overall score
5
732.1/9
5
81.3
c.
2 of 9 are located in England; approximately 22%
d.
4 of 9 have a room rate of $$; approximately 44%
4. a.
10
b.
All brands of minisystems manufactured
c.
$314
d.
$314
6.
Questions a, c, and d provide quantitative data
Questions b and e provide categorical data
8. a.
1005
b.
Categorical
c.
Percentages
d.
Approximately 291
10. a.
Quantitative; ratio
b.
Categorical; nominal
c.
Categorical; ordinal
d.
Quantitative; ratio
e.
Categorical; nominal
12. a.
All visitors to Hawaii
b.
Yes
c.
First and fourth questions provide quantitative data
Second and third questions provide categorical data
13. a.
Earnings in billions of dollars are quantitative data
b.
Time series for 1997 to 2005
c.
Earnings for Volkswagen
d.
Earnings are relatively low in 1997 to 1999, excellent
growth occurs in 2000 and 2001, and decline hap
pens in 2003 to 2005; the decline in earnings sug
gests the $600 million projected earnings for 2006
is reasonable
e.
In July 2001, the earnings tread was positive;
Volkswagen would have been a promising investment
in 2001
f.
Be careful when projecting time series data into the
future, because trends in past data may or may not
continue
14. a.
Graph with a time series line for each manufacturer
b.
Toyota surpasses General Motors in 2006 to become
the leading auto manufacturer
c.
A bar chart would show crosssectional data for 2007;
bar heights would be GM 8.8, Ford 7.9, DC 4.6, and
Toyota 9.6
16. a.
Product taste tests and test marketing
b.
Specially designed statistical studies
18. a.
36%
b.
189
c.
Categorical
20. a.
43% of managers were bullish or very bullish, and 21%
of managers expected health care to be the leading
industry over the next 12 months
b.
The average 12month return estimate is 11.2% for the
population of investment managers
c.
The sample average of 2.5 years is an estimate of how
long the population of investment managers think it
will take to resume sustainable growth
22. a.
All registered voters in California
b.
Registered voters contacted by the Policy Institute
c.
Too time consuming and costly to reach the entire
population
24. a.
Correct
b.
Incorrect
c.
Correct
d.
Incorrect
e.
Incorrect
Chapter 2
2. a.
.20
b.
40
c/d.
3. a.
360°
3
58/120
5
174°
b.
360°
3
42/120
5
126°
Percent
Class
Frequency
Frequency
A4
4
2
2
B3
6
1
8
C8
0
4
0
D4
0
2
0
Total
200
100
56130_23_appendixD.qxd
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12:34 AM
Page 875
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Appendix D
SelfTest Solutions and Answers to EvenNumbered Exercises
c.
d.
4. a.
Categorical
b.
d.
CSI
had the largest;
DH
was second
6. a.
b.
CBS and NBC tied for first; ABC is close with 15
7.
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 Spring '11
 Larkin,M
 Economics, Econometrics, Normal Distribution, A., B., Cumulative distribution function

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