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
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2.12
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2.13
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2.14
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2.15
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2.16
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2.17
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2.18
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2.19
Residential
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Non-Residential
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2.20 a.
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b.
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The bar chart provides the frequencies and the pie chart displays the relative frequencies.
2.21
Males
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Females
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2.22
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2.23
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2.24
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2.25
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2.26
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2.27
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2.28
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2.29 a Newspaper Frequency Relative Frequency Daily News 141 .39 Post 128 .36 Times 32 .09 WSJ 59 .16
b
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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.
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c
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d. About 4 applicants in 10 have the BA degree, about one-fifth have a BEng. and one-sixth have a BBA.
2.31a
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b
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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
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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
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2.34
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Three out of four Americans are White. Note that the survey did not separate Hispanics.
2.35
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Half of American adults finished high school only. Approximately one-third received some kind of post-secondary education.
2.36
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Almost half the sample is married and about one out of four were never married.
2.37
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Nine of out of 10 Americans classify themselves as middle or working class.
2.38
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The “Less than high school” category has remained constant, while the number of college graduates has increased.
2.39
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The state and local consumption has increased rapidlycompared to the other categories.
2.40 Australian Energy Sources
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New Zealand Energy Sources
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The dominant source in Australia is coal. In New Zealand it is oil.
2.41
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Street crime has decreased while all the other categories have remained constant.
2.42
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Universities 1 and 2 are similar and quite dissimilar from universities 3 and 4, which also differ. The two nominal