Question 1

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

Accepted Answer

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

Question 2

The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called

Accepted Answer

A) descriptive statistics 
B) statistical inference 
C) data analysis 
D) data summarization 
A) descriptive statistics 
B) statistical inference 
C) data analysis 
D) data summarization

Question 3

Since a sample is a subset of the population, a percentage that is calculated from the sample data

Accepted Answer

A) is always smaller than the corresponding percentage from the population 
B) is always larger than the corresponding percentage from the population 
C) must be equal to the corresponding percentage from the population 
D) can be larger, smaller, or equal to the corresponding percentage from the population 
A) is always smaller than the corresponding percentage from the population 
B) is always larger than the corresponding percentage from the population 
C) must be equal to the corresponding percentage from the population 
D) can be larger, smaller, or equal to the corresponding percentage from the population

Question 4

Categorical data

Accepted Answer

A) indicate either how much or how many 
B) can not be numeric 
C) are labels used to identify attributes of elements 
D) must be nonnumeric 
A) indicate either how much or how many 
B) can not be numeric 
C) are labels used to identify attributes of elements 
D) must be nonnumeric

Question 5

The summaries of data, which may be tabular, graphical, or numerical, are referred to as

Accepted Answer

A) inferential statistics 
B) descriptive statistics 
C) statistical inference 
D) report generation 
A) inferential statistics 
B) descriptive statistics 
C) statistical inference 
D) report generation

Question 6

Six hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The six hundred residents in this study is an example of a(n)

Accepted Answer

A) census 
B) sample 
C) observation 
D) population 
A) census 
B) sample 
C) observation 
D) population

Question 7

The birth weight of newborns, measured in grams, is an example of

Accepted Answer

A) categorical data 
B) either categorical or quantitative data 
C) neither categorical nor quantitative data 
D) quantitative data 
A) categorical data 
B) either categorical or quantitative data 
C) neither categorical nor quantitative data 
D) quantitative data

Question 8

Arithmetic operations are inappropriate for

Accepted Answer

A) categorical data 
B) quantitative data 
C) both categorical and quantitative data 
D) large data sets 
A) categorical data 
B) quantitative data 
C) both categorical and quantitative data 
D) large data sets

Question 9

An issue of Fortune Magazine reported that the following companies had the lowest sales per employee among the Fortune 500 companies.
   
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 scale of measurement for each of the variables.
e.Name the variables and indicate whether they are categorical or quantitative.

Accepted Answer

a.5
b.2
c.5
d.Sales per employ

Question 10

Quantitative data

Accepted Answer

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

Question 11

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 F1F1F1S1F1F1F10 clear; cl F1F1F1S1F1F1F10 cloudy; sh F1F1F1S1F1F1F10 showers; pc F1F1F1S1F1F1F10 partly cloudy.
   
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 scale of measurement for each of the variables.
e.Name the variables and indicate whether they are categorical or quantitative.f. For which variables are arithmetic operations appropriate and for which are they not appropriate?

Accepted Answer

a.7
b.3
c.7
d.Hi: interval, Lo

Question 12

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _________ extraction of _________ information from databases".

Accepted Answer

A) thorough, insightful 
B) timely, accurate 
C) automated, predictive 
D) intentional, useful 
A) thorough, insightful 
B) timely, accurate 
C) automated, predictive 
D) intentional, useful

Question 13

A characteristic of interest for the elements is called a(n)

Accepted Answer

A) sample 
B) data set 
C) variable 
D) observation 
A) sample 
B) data set 
C) variable 
D) observation

Question 14

After the graduation ceremonies at a university, six graduates were asked whether they were in favor of (identified by 1) or against (identified by 0) abortion. Some information about these graduates is 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 above (Sex, Age, Abortion Issue, Class rank).
e.Which of the above (Sex, Age, Abortion Issue, Class rank) are categorical and which are quantitative variables?f. No

Accepted Answer

a.6
b.4
c.6
d.Sex: nominal
Age

Question 15

Temperature is an example of

Accepted Answer

A) a categorical variable 
B) a quantitative variable 
C) either a quantitative or categorical variable 
D) neither a quantitative nor categorical variable 
A) a categorical variable 
B) a quantitative variable 
C) either a quantitative or categorical variable 
D) neither a quantitative nor categorical variable

Question 16

Michael, Inc., a manufacturer of electric guitars, is a small firm with 50 employees. The table below shows the hourly wage distribution of the employees.
   
a.How many employees receive hourly wages of at least $18?
b.What percentage of the employees has hourly wages of at least $18?
c.What percentage of the employees has hourly wages of less than $14?

Accepted Answer

The answer of Michael, Inc., a manufacturer of electric guitars,...

Question 17

Laura Naples, Manager of Heritage Inn, periodically collects and tabulates information about a sample of the hotel's overnight guests. This information aids her in planning and scheduling decisions she must make. The table below lists data on ten randomly selected hotel registrants, collected as the registrants checked out. The data listed for each registrant are: number of people in the group; birth date of person registering; shuttle service used, yes or no; total telephone charges incurred; and reason for stay, business or personal.
   
a. How many elements are there in the data set?
b. How many variables are there in the data set?
c. How many observations are there in the data set?
d. What are the observations for the second element listed?
e. What is the total number of measurements in the data set?f. Which variables are quantitative?g. Which variables are qualitative?h. What is the scale of measurement for each of the variables?i. Does the data set represent cross-sectional or times series data?j. Does the data set represent an experimental or an observational study?

Accepted Answer

a. 10 elements
b. 5 variables
c. 10 obse

Question 18

When the data have the properties of interval data and the ratio of two values is meaningful, the variable has which scale of measurement?

Accepted Answer

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

Question 19

Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one or more city codes.
-Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a

Accepted Answer

A) census 
B) sample 
C) probability 
D) population 
A) census 
B) sample 
C) probability 
D) population

Question 20

A recent issue of a national magazine reported that in a national public opinion survey conducted among 2,000 individuals, 56% were in favor of gun control, 40% opposed gun control, and 4% had no opinion on the subject.
a.What is the sample in this survey?
b.Based on the sample, what percentage of the population would you think is in favor of gun control?
c.Based on the sample, what percentage of the population would you think have no opinion on the subject?

Accepted Answer

a.The 2000 individua

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

The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called

Since a sample is a subset of the population, a percentage that is calculated from the sample data

Categorical data

The summaries of data, which may be tabular, graphical, or numerical, are referred to as

Six hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The six hundred residents in this study is an example of a(n)

The birth weight of newborns, measured in grams, is an example of

Arithmetic operations are inappropriate for

Quantitative data

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _ extraction of _ information from databases".

A characteristic of interest for the elements is called a(n)

Temperature is an example of

When the data have the properties of interval data and the ratio of two values is meaningful, the variable has which scale of measurement?

Exhibit 1-1 In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one or more city codes. -Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a

Descriptive Statistics: Tabular and Graphical Presentations

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

Statistical Methods for Quality Control

Time Series Analysis and Forecastng

Filters

Exam 1: Data and Statistics

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

The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called

Since a sample is a subset of the population, a percentage that is calculated from the sample data

Categorical data

The summaries of data, which may be tabular, graphical, or numerical, are referred to as

Six hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The six hundred residents in this study is an example of a(n)

The birth weight of newborns, measured in grams, is an example of

Arithmetic operations are inappropriate for

Quantitative data

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _________ extraction of _________ information from databases".

A characteristic of interest for the elements is called a(n)

Temperature is an example of

When the data have the properties of interval data and the ratio of two values is meaningful, the variable has which scale of measurement?

Exhibit 1-1 In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one or more city codes. -Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a

Descriptive Statistics: Tabular and Graphical Presentations

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

Statistical Methods for Quality Control

Time Series Analysis and Forecastng

Filters

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _ extraction of _ information from databases".