Question 1

Arithmetic operations are appropriate for

Accepted Answer

A)  only the ratio scale 
B)  only the interval scale 
C)  the nominal scale 
D)  None of these alternatives is correct. 
A)  only the ratio scale 
B)  only the interval scale 
C)  the nominal scale 
D)  None of these alternatives is correct.

Question 2

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)  None of these alternatives is correct. 
A)  only with categorical data 
B)  only with quantitative data 
C)  either with quantitative or categorical data 
D)  None of these alternatives is correct.

Question 3

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

Accepted Answer

A)  inference 
B)  variable 
C)  data set 
D)  None of these alternatives is correct. 
A)  inference 
B)  variable 
C)  data set 
D)  None of these alternatives is correct.

Question 4

Social security numbers consist of numeric values. Therefore, social security is an example of

Accepted Answer

A)  a quantitative variable 
B)  either a quantitative or a categorical variable 
C)  an exchange variable 
D)  a categorical variable 
A)  a quantitative variable 
B)  either a quantitative or a categorical variable 
C)  an exchange variable 
D)  a categorical variable

Question 5

The following table shows the age distribution of a sample of 180 students at a local college.
AGE DISTRIBUTION OF 180 STUDENTS AT A LOCAL COLLEGE
 $\begin{array}{|c|r|}
\hline \text { Age Category } & \text { Number of students } \
\hline 15-19 & 36 \
\hline 20-24 & 44 \
\hline 25-29 & 60 \
\hline 30-34 & 38 \
\hline 35-39 & 2 \
\hline \text { Total } & 18 \
\hline
\end{array}$ 
a. Of the students in the sample, what percentage is younger than 20 years of age?
b. What percentage is at least 30 years of age?
c. Based on this sample, what percentage of the students at the college do you estimate to be younger than 25 years of age?

Accepted Answer

a. 20%
b.

Question 6

The following shows the temperatures high, low) and weather conditions in a given Sunday for some selected world cities. For the weather conditions, the following notations are used: c = clear; cl = cloudy; sh = showers; pc = partly cloudy.
 $$\begin{array} { l l c c } 
\text { City } & \text { Hi } & \text { Lo } & \text { Condition } \
\text { Acapulca } & 99 & 77 & \mathrm { pc } \
\text { Bangkak } & 92 & 78 & \mathrm { pc } \
\text { Meaca City } & 77 & 57 & \mathrm { sh } \
\text { Montreal } & 72 & 56 & \mathrm { pc } \
\text { Paris } & 77 & 58 & \mathrm { c } \
\text { Rame } & 88 & 68 & \mathrm { d } \
\text { Toronto } & 78 & 61 & \mathrm { c }
\end{array}$$ 
a. How many elements are in this data set?
b. How many variables are in this data set?
c. How many observations are in this data set?
d. Name the variables and indicate whether they are categorical or quantitative.
e. For which variables are arithmetic operations appropriate and for which are they not appropriate?

Accepted Answer

a. 7
b. 3
c. 7
d. Hi: quantita

Question 7

The entities on which data are collected are

Accepted Answer

A)  elements 
B)  populations 
C)  samples 
D)  None of these alternatives is correct. 
A)  elements 
B)  populations 
C)  samples 
D)  None of these alternatives is correct.

Question 8

A recent issue of Fortune Magazine reported that the following companies had the lowest sales per employee among the Fortune 500 companies.
 $$\begin{array} { l c c } 
& \text { Salas per Employee } & \text { Sales } \
\text { Company } & \text { In \$1,000s } & \text { Rank } \
\text { Seagate Technology } & 42.20 & 285 \
\text { SSMC } & 42.19 & 414 \
\text { Russel } & 41.99 & 480 \
\text { Maxxam } & 40.88 & 485 \
\text { Dibrell Brothers } & 22.56 & 470
\end{array}$$ 
a. How many elements are in the above data set?
b. How many variables are in the above data set?
c. How many observations are in the above data set?
d. Name the variables and indicate whether they are categorical or quantitative.

Accepted Answer

a. 5
b. 2
c. 5
d. Sa

Question 9

Income is an example of a variable that uses the

Accepted Answer

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

Question 10

In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

Accepted Answer

A)  categorical data 
B)  quantitative data 
C)  either categorical or quantitative data 
D)  since the numbers are sequential, the data is quantitative 
A)  categorical data 
B)  quantitative data 
C)  either categorical or quantitative data 
D)  since the numbers are sequential, the data is quantitative

Question 11

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

Accepted Answer

A)  the population 
B)  the sampling 
C)  statistical inference 
D)  Data and Statistics 
A)  the population 
B)  the sampling 
C)  statistical inference 
D)  Data and Statistics

Question 12

The height of a building, measured in feet, is an example of

Accepted Answer

A)  categorical data 
B)  either categorical or quantitative data 
C)  feet data 
D)  quantitative data 
A)  categorical data 
B)  either categorical or quantitative data 
C)  feet data 
D)  quantitative data

Question 13

Statistical studies in which researchers do not control variables of interest are

Accepted Answer

A)  experimental studies 
B)  uncontrolled experimental studies 
C)  not of any value 
D)  observational studies 
A)  experimental studies 
B)  uncontrolled experimental studies 
C)  not of any value 
D)  observational studies

Question 14

The process of conducting a survey to collect data for a sample is called a

Accepted Answer

A)  sample survey 
B)  census 
C)  inference 
D)  either inference or census depending on the situation 
A)  sample survey 
B)  census 
C)  inference 
D)  either inference or census depending on the situation

Question 15

Exhibit 1-4
In many universities, students evaluate their professors by means of answering a questionnaire. Assume a questionnaire is distributed to a class of 45 students. Students are asked to answer the following:
1. Sex
2. Race Black, White, Other)
3. Age
4. Number of hours completed
5. Grade point average
"6. My instructor is a very effective teacher
 $$\begin{array}{l}
1&2&3&4&5\
\text { strongly agree } & \text {moderately agree} & \text { neutral } & \text {moderately disagree} & \text { strongly disagree }\\end{array}$$ "
-Refer to Exhibit 1-4. How many observations are in this data set?

Accepted Answer

A)  5 
B)  6 
C)  3 
D)  45 
A)  5 
B)  6 
C)  3 
D)  45

Question 16

The scale of measurement that is used to rank order the observation for a variable is called the

Accepted Answer

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

Question 17

The average age in a sample of 190 students at City College is 22. 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 22, since the population is always larger than the sample 
B)  must be less than 22, since the sample is only a part of the population 
C)  could not be 22 
D)  could be larger, smaller, or equal to 22 
A)  must be more than 22, since the population is always larger than the sample 
B)  must be less than 22, since the sample is only a part of the population 
C)  could not be 22 
D)  could be larger, smaller, or equal to 22

Question 18

A characteristic of interest for the elements is called an)

Accepted Answer

A)  sample 
B)  data set 
C)  variable 
D)  None of these alternatives is correct. 
A)  sample 
B)  data set 
C)  variable 
D)  None of these alternatives is correct.

Question 19

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

Question 20

Another name for "observations" is

Accepted Answer

A)  views 
B)  variables 
C)  cases 
D)  None of these alternatives is correct. 
A)  views 
B)  variables 
C)  cases 
D)  None of these alternatives is correct.

Arithmetic operations are appropriate for

Ordinary arithmetic operations are meaningful

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

Social security numbers consist of numeric values. Therefore, social security is an example of

The entities on which data are collected are

Income is an example of a variable that uses the

In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

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

The height of a building, measured in feet, is an example of

Statistical studies in which researchers do not control variables of interest are

The process of conducting a survey to collect data for a sample is called a

The scale of measurement that is used to rank order the observation for a variable is called the

The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students at City College

A characteristic of interest for the elements is called an)

Statistical studies in which researchers control variables of interest are

Another name for "observations" is

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters

Exam 1: Data and Statistics

Arithmetic operations are appropriate for

Ordinary arithmetic operations are meaningful

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

Social security numbers consist of numeric values. Therefore, social security is an example of

The entities on which data are collected are

Income is an example of a variable that uses the

In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

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

The height of a building, measured in feet, is an example of

Statistical studies in which researchers do not control variables of interest are

The process of conducting a survey to collect data for a sample is called a

The scale of measurement that is used to rank order the observation for a variable is called the

The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students at City College

A characteristic of interest for the elements is called an)

Statistical studies in which researchers control variables of interest are

Another name for "observations" is

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters