Chapter 1 - Homework

Which scale of measurement can be either numeric or nonnumeric? a. nominal and ordinal b. interval c. nominal d. ordinal

a. nominal and ordinal

Which of the following is an example of qualitative data a. social security number b. score on a multiple-choice exam c. height, in meters, of a diving board d. number of square feet of carpet

a. social security number

The number observations in a complete data set having 10 elements and 5 variables is a. 5 b. 10 c. 25 d. 50

b. 10

When the data have the properties of ordinal data and the interval between observations is expressed in terms of a fixed unit of measure, the variable has which scale of measurement? a. nominal b. interval c. ordinal d. ratio

b. interval

Categorical data a. are always nonnumeric b. may be either numeric or nonnumeric c. are always numeric d. indicate either how much or how many

b. may be either numeric or nonnumeric

In a questionnaire, respondents are asked to record their age in years. Age is an example of a a. ratio variable b. quantitative variable c. categorical variable d. categorical or quantitative variable, depending on how the respondents answered the question

b. quantitative variable

Categorical data a. must be nonnumeric b. indicate either how much or how many c. are labels used to identify attributes of elements d. can not be numeric

c. are labels used to identify attributes of elements

The owner of a factory regularly requests a graphical summary of all employees' salaries. The graphical summary of salaries is an example of a. statistical inference b. a sample c. descriptive statistics d. an experiment

c. descriptive statistics

When the data are labels or names used to identify an attribute of the elements, the variable has which scale of measurement? a. ordinal b. interval c. nominal d. ratio

c. nominal

Ordinary arithmetic operations are meaningful a. either with quantitative or categorical data b. only with categorical data c. only with quantitative data d. with rank data

c. only with quantitative data

When the data have the properties of interval data and the ratio of two values is meaningful, the variable has which scale of measurement? a. nominal b. ordinal c. ratio d. interval

c. ratio

Exhibit 1-2 In a sample of 3,200 registered voters, 1,440, or 45%, approve of the way the President is doing his job. Refer to Exhibit 1-2. A political pollster states, "Forty five percent of all voters approve of the President." This statement is an example of a. a sample b. descriptive statistics c. statistical inference d. a population

c. statistical inference

In a sample of 800 students in a university, 160, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of a. a sample b. descriptive statistics c. statistical inference d. a population

c. statistical inference

A Scanner Data User Survey of 50 companies found that the average amount spent on scanner data per category of consumer goods was $387,325 (Mercer Management Consulting, Inc., April 24, 1997). The $387,325 is an example of a. quantitative data b. categorical data c. a descriptive statistic d. Both quantitative data and a descriptive statistic are correct.

d. both quantitative data and a descriptive statistic are correct

In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of a a. categorical or quantitative variable, depending on how the respondents answered the question b. ratio variable c. quantitative variable d. categorical variable

d. categorical variable