Chapter 2

2.1 Nominal: Occupation, undergraduate major. Ordinal: Rating of university professor, Taste test ratings. Interval: age, income

2.2 a Interval b Interval c Nominal d Ordinal

2.3 a Interval b Nominal c Ordinal d Interval e Interval

2.4 a Nominal b Interval c Nominal d Interval e Ordinal

2.5 a Interval b Interval c Nominal d Interval e Nominal

2.6 a Interval b Interval c Nominal d Ordinal e Interval

2.7 a Interval b Nominal
c. Nominal d Interval e Interval f Ordinal

2.8 a Interval b Ordinal c Nominal d Ordinal

2.9 a Interval b Nominal c Nominal

2.10 a Ordinal b Ordinal c Ordinal

2.11
[pic]

2.12
[pic]

2.13
[pic]

2.14
[pic]

2.15
[pic]

2.16
[pic]

2.17
[pic]

2.18
[pic]

2.19
Residential
[pic]

Non-Residential
[pic]

2.20 a.
[pic]

b.
[pic]

The bar chart provides the frequencies and the pie chart displays the relative frequencies.

2.21
Males
[pic]

Females
[pic]

2.22
[pic]

2.23
[pic]

2.24
[pic]

2.25
[pic]

2.26
[pic]

2.27
[pic]

2.28
[pic]

2.29 a Newspaper Frequency Relative Frequency Daily News 141 .39 Post 128 .36 Times 32 .09 WSJ 59 .16

b
[pic]

The Daily News and the Post dominate the market

2.30a Degree Frequency BA 88 BBA 37 B Eng 51 B Sc 24 Other 30
b.
[pic]

c
[pic]

d. About 4 applicants in 10 have the BA degree, about one-fifth have a BEng. and one-sixth have a BBA.

2.31a
[pic]

b
[pic]

c Dell is most popular with 40% proportion, followed by other, 26%, IBM, 21% and Compaq, 13%.

2.32 a Software Frequency Excel 34 Minitab 17 SAS 3 SPSS 4 Other 12

b
[pic]
c Excel is the choice of about half the sample, one-quarter have opted for Minitab, and a small fraction chose SAS and SPSS.

2.33
[pic]

2.34
[pic]

Three out of four Americans are White. Note that the survey did not separate Hispanics.

2.35
[pic]

Half of American adults finished high school only. Approximately one-third received some kind of post-secondary education.

2.36
[pic]

Almost half the sample is married and about one out of four were never married.

2.37
[pic]
Nine of out of 10 Americans classify themselves as middle or working class.

2.38
[pic]
The “Less than high school” category has remained constant, while the number of college graduates has increased.

2.39
[pic]

The state and local consumption has increased rapidlycompared to the other categories.

2.40 Australian Energy Sources
[pic]

New Zealand Energy Sources
[pic]
The dominant source in Australia is coal. In New Zealand it is oil.

2.41
[pic]

Street crime has decreased while all the other categories have remained constant.

2.42
[pic]

[pic]

Universities 1 and 2 are similar and quite dissimilar from universities 3 and 4, which also differ. The two nominal