Question 1

For ease of data entry into a university database, 1 denotes the student is enrolled in an undergraduate degree program, 2 indicates the student is enrolled in a master's degree program, and 3 indicates the student is enrolled in a doctoral degree program. In this case, the data are which scale of measurement?

Accepted Answer

A)  nominal 
B)  ordinal 
C)  interval 
D)  ratio

Question 2

The term data warehousing is used to refer to the process of doing all of the following, except _____ the data.

Accepted Answer

A)  capturing 
B)  storing 
C)  maintaining 
D)  mining

Question 3

Data collected over several time periods are _____ data.

Accepted Answer

A)  time series 
B)  time-controlled 
C)  cross-sectional 
D)  time dependent

Question 4

A portion of the population selected to represent the population is called _____.

Accepted Answer

A)  statistical inference 
B)  descriptive statistics 
C)  a census 
D)  a sample

Question 5

Quantitative data _____.

Accepted Answer

A)  are always nonnumeric 
B)  may be either numeric or nonnumeric 
C)  are always numeric 
D)  are always labels

Question 6

All data collected in a study are referred to as the _____.

Accepted Answer

A)  census 
B)  inference 
C)  variable 
D)  data set

Question 7

In a questionnaire, respondents are asked to record their age in years. Age is an example of a _____.

Accepted Answer

A)  categorical variable 
B)  quantitative variable 
C)  categorical or quantitative variable, depending on how the respondents answered the question 
D)  ratio variable

Question 8

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, "20% of all students at the university are Business majors." This report is an example of _____.

Accepted Answer

A)  a sample 
B)  a population 
C)  statistical inference 
D)  descriptive statistics

Question 9

Which of the following variables uses the interval scale of measurement?

Accepted Answer

A)  name of stock exchange 
B)  time 
C)  SAT scores 
D)  social security number

Question 10

Of 800 students in a university, 360, or 45%, live in the dormitories. The 800 is an example of _____.

Accepted Answer

A)  a sample 
B)  a population 
C)  statistical inference 
D)  descriptive statistics

Question 11

Which of the following is an example of quantitative data?

Accepted Answer

A)  the player's number on a baseball uniform 
B)  the serial number on a one-dollar bill 
C)  the part number of an inventory item 
D)  the number of people in a waiting line

Question 12

In a data set, the number of observations will always be the same as the number of _____.

Accepted Answer

A)  variables 
B)  elements 
C)  data sets 
D)  data

Question 13

Quantitative data that measure "how many" are ________; quantitative data that measure "how much" are ________.

Accepted Answer

A)  interval; ratio 
B)  ratio; interval 
C)  continuous; discrete 
D)  discrete; continuous

Question 14

What organization developed the report, "Ethical Guidelines for Statistical Practice"?

Accepted Answer

A)  Ethics Committee for Statistical Practices 
B)  American Statistical Association 
C)  International Statistical Organization 
D)  Federal Bureau for Ethical Practices in Statistics

Question 15

Which of the following is NOT a categorical variable?

Accepted Answer

A)  your age on your last birthday 
B)  your cell phone area code 
C)  your accounting class start time 
D)  your high school graduation year

Question 16

A statistics professor asked students in a class their ages. Based on this information, the professor states that the average age of students in the university is 21 years. This is an example of _____.

Accepted Answer

A)  a census 
B)  descriptive statistics 
C)  an experiment 
D)  statistical inference

Question 17

The term _____ is used to refer to the process of capturing, storing, and maintaining data.

Accepted Answer

A)  data warehousing 
B)  data mining 
C)  data analysis 
D)  data collection

Question 18

The entities on which data are collected are _____.

Accepted Answer

A)  elements 
B)  populations 
C)  sets 
D)  samples

Question 19

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 _____.

Accepted Answer

A)  categorical data 
B)  quantitative data 
C)  a descriptive statistic 
D)  Both quantitative data and a descriptive statistic are correct.

Question 20

Statistical inference _____.

Accepted Answer

A)  refers to the process of drawing inferences about the sample based on the characteristics of the population 
B)  is the same as descriptive statistics 
C)  is the process of drawing inferences about the population based on the information taken from the sample 
D)  is the same as a census

Exam 1: Data and Statistics