Question 1

Categorical data

Accepted Answer

A) are always nonnumeric 
B) may be either numeric or nonnumeric 
C) are always numeric 
D) indicate either how much or how many 
A) are always nonnumeric 
B) may be either numeric or nonnumeric 
C) are always numeric 
D) indicate either how much or how many

Question 2

A magazine surveys a sample of its subscribers every year. Some of the responses are shown below.   
a.How many variables are in the data set?
b.Name the scale of measurement for each variable.
c.Which of the above (Year, Percent Female, Average Age, Average Annual Household Income) are categorical and which are quantitative?
d.Are the data time series or cross-sectional?

Accepted Answer

a.4
b.Year: interval, Percent

Question 3

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

Question 4

The number observations in a complete data set having 10 elements and 5 variables is

Accepted Answer

A) 5 
B) 10 
C) 25 
D) 50 
A) 5 
B) 10 
C) 25 
D) 50

Question 5

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 
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 6

A polling organization conducts a telephone poll of 850 registered voters and asks which candidate they will vote for in the upcoming presidential election. Forty-three percent of the respondents prefer candidate A and 45% prefer candidate B.
a.What is the population being studied?
b.What is the sample being studied?
c.Based on the sample, what percentage of the population do you think would vote for candidate B?

Accepted Answer

a.All registered vot

Question 7

Which of the following is NOT an example of a firm that sells or leases business database services to clients?

Accepted Answer

A) Dun & Bradstreet 
B) Bloomberg 
C) U. S. Census Bureau 
D) All of these answers are examples of firms that sell or lease business database services to clients. 
A) Dun & Bradstreet 
B) Bloomberg 
C) U. S. Census Bureau 
D) All of these answers are examples of firms that sell or lease business database services to clients.

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

When the data are labels or names used to identify an attribute of the elements, 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 10

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 11

The following table shows the starting salaries of a sample of recent VoTech graduates.   
a.What percentage of graduates in the sample had starting salaries of at least $40,000?
b.Of the graduates in the sample, what percentage had starting salaries of less than $35,000?
c.Based on this sample, what percentage of all VoTech graduates do you estimate to have starting salaries of at least $30,000?

Accepted Answer

The answer of The following table shows the starting salaries...

Question 12

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 13

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.   
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 14

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

Question 15

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 16

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 17

Categorical data

Accepted Answer

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

Question 18

Since a sample is a subset of the population, the sample mean

Accepted Answer

A) is always smaller than the mean of the population 
B) is always larger than the mean of the population 
C) must be equal to the mean of the population 
D) can be larger, smaller, or equal to the mean of the population 
A) is always smaller than the mean of the population 
B) is always larger than the mean of the population 
C) must be equal to the mean of the population 
D) can be larger, smaller, or equal to the mean of the population

Question 19

Suppose the current weather report for your area contains the following information. Specify the measurement scale for each of the variables.

Accepted Answer

Temperature - interval
Wind Sp

Question 20

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

Categorical data

Ordinary arithmetic operations are meaningful

The number observations in a complete data set having 10 elements and 5 variables is

Which of the following is not a categorical variable?

Which of the following is NOT an example of a firm that sells or leases business database services to clients?

Arithmetic operations are inappropriate for

When the data are labels or names used to identify an attribute of the elements, the variable has which scale of measurement?

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)

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

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?

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

Categorical data

Since a sample is a subset of the population, the sample mean

Suppose the current weather report for your area contains the following information. Specify the measurement scale for each of the variables.

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

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

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit, Independence and Multiple Proportions

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

Exam 1: Data and Statistics

Categorical data

Ordinary arithmetic operations are meaningful

The number observations in a complete data set having 10 elements and 5 variables is

Which of the following is not a categorical variable?

Which of the following is NOT an example of a firm that sells or leases business database services to clients?

Arithmetic operations are inappropriate for

When the data are labels or names used to identify an attribute of the elements, the variable has which scale of measurement?

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)

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

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?

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

Categorical data

Since a sample is a subset of the population, the sample mean

Suppose the current weather report for your area contains the following information. Specify the measurement scale for each of the variables.

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

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

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit, Independence and Multiple Proportions

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters