Question 1

All the data collected in a particular study are referred to as the

Accepted Answer

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

Question 2

In a post office, the mailboxes are numbered from 1 to 5,000. These numbers represent

Accepted Answer

A)  categorical data
B)  time series data
C)  either categorical or quantitative data
D)  quantitative data A

Question 3

Flight time from Cincinnati to Atlanta is an example of a _______ variable and _______ measurement.

Accepted Answer

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

Question 4

Which scale of measurement can be either numeric or nonnumeric?

Accepted Answer

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

Question 5

Molly Porter owns and operates two convenience stores, one on the East side of the city and the other on the South side. She has workforce-planning decisions to make and has collected some recent sales data that are relevant to her decisions. Listed below are the monthly sales ($000) at her two stores for the past six months.
  
a. Is the data set cross-sectional or time series data? Explain.
b. Comment on any apparent patterns you see in the data.

Accepted Answer

The answer of Molly Porter owns and operates two convenience...

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

A)  name of stock exchange
B)  time
C)  SAT scores
D)  Social Security number

Question 8

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 9

Ordinary arithmetic operations are meaningful

Accepted Answer

A)  only with categorical data
B)  only with quantitative data
C)  either with quantitative or categorical data
D)  with rank data

Question 10

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

Accepted Answer

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

Question 11

Which of the following is not an example of descriptive statistics?

Accepted Answer

A)  a histogram depicting the age distribution for 30 randomly selected students
B)  an estimate of the number of Alaska residents who have visited Canada
C)  a table summarizing the data collected in a sample of new-car buyers
D)  the proportion of mailed-out questionnaires that were returned

Question 12

Statistical studies in which researchers control variables of interest are

Accepted Answer

A)  experimental studies
B)  control observational studies
C)  non experimental studies
D)  observational studies

Question 13

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 14

Facts and figures that are collected, analyzed and summarized for presentation and interpretation are

Accepted Answer

A)  data
B)  variables
C)  elements
D)  Both variables and elements are correct.

Question 15

The average age in a sample of 90 students at City College is 20. As a result of this sample, it can be concluded that the average age of all the students at City College

Accepted Answer

A)  must be more than 20, since the population is always larger than the sample
B)  must be less than 20, since the sample is only a part of the population
C)  could not be 20
D)  could be larger, smaller, or equal to 20

Question 16

A sample of five Fortune 500 companies showed the following industry codes: banking, banking, finance, retail, and banking. Based on this information, which of the following statements is correct?

Accepted Answer

A)  Sixty percent of the sample of five companies are banking industries.
B)  Sixty percent of all Fortune 500 companies are banking industries.
C)  Banking is the most common type of industry among all Fortune 500 companies.
D)  If five other Fortune 500 companies were chosen, 60% of them would be banking industries.

Question 17

A magazine surveyed a sample of its subscribers. Some of the responses from the survey are shown below.

a.How many elements are in the data set?
b.How many variables are in the data set?
c.How many observations are in the data set?
d.Name the scale of measurement for each of the variables.
e.Which of the above (Sex, Age, Annual Household Income) are categorical and which are quantitative?f. Are the data time series or cross-sectional?

Accepted Answer

The answer of A magazine surveyed a sample of its...

Question 18

The collection of all elements of interest in a particular study is

Accepted Answer

A)  the population
B)  the sampling
C)  statistical inference
D)  descriptive statistics

Question 19

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?

Accepted Answer

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

Question 20

Which of the following is NOT an example of an existing source of data?

Accepted Answer

A)  The Internet
B)  Internal company records
C)  U. S. Census Bureau
D)  All of these are examples of existing sources of data.

Exam 1: Data and Statistics