Question 1

In a questionnaire, respondents are asked to mark their gender as male or female. Gender 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 
A) categorical variable 
B) quantitative variable 
C) categorical or quantitative variable, depending on how the respondents answered the question 
D) ratio variable

Question 2

The following data shows the yearly income distribution of a sample of 200 employees at MNM, Inc.   
a.What percentage of employees has yearly incomes of more than $35,000?
b.Is the figure (percentage) that you computed in Part a an example of statistical inference? If no, what kind of statistics does it represent?
c.Based on this sample, the president of the company said that "45% of all our employees' yearly incomes are over $35,000." The president's statement represents what kind of statistics?
d.With the statement made in Part c, can we be assured that more than 45% of all employees' yearly incomes are at least $35,000? Explain.
e.What percentage of employees of the sample has yearly incomes of $29,000 or less?f. How many variables are presented in the above data set?g. The above data set represents the results of how many observations?

Accepted Answer

a.45%
b.No, it is descriptive

Question 3

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 4

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 
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

Question 5

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.

Question 6

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

Question 7

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. The 45% approval is an example of

Accepted Answer

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

Question 8

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 manager's statement that 60% of Daisy City's 3,000 homes are in violation of city codes is

Accepted Answer

A) an exactly correct statement 
B) only an approximation, since it is based upon sample information 
C) obviously wrong, since it is based upon a study of only 200 homes 
D) None of the other answers are correct. 
A) an exactly correct statement 
B) only an approximation, since it is based upon sample information 
C) obviously wrong, since it is based upon a study of only 200 homes 
D) None of the other answers are correct.

Question 9

The entities on which data are collected are

Accepted Answer

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

Question 10

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 11

The set of measurements collected for a particular element is (are) called

Accepted Answer

A) census 
B) variables 
C) observations 
D) samples 
A) census 
B) variables 
C) observations 
D) samples

Question 12

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 13

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 14

The most common type of observational study is

Accepted Answer

A) an experiment 
B) a survey 
C) a debate 
D) a statistical inference 
A) an experiment 
B) a survey 
C) a debate 
D) a statistical inference

Question 15

__________ is a spreadsheet package.

Accepted Answer

A) Statistical inference 
B) The bar chart 
C) The New York Stock Exchange 
D) Microsoft Excel 
A) Statistical inference 
B) The bar chart 
C) The New York Stock Exchange 
D) Microsoft Excel

Question 16

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 17

The Department of Transportation of a city has noted that on the average there are 14 accidents per day. The average number of accidents is an example of

Accepted Answer

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

Question 18

Categorical data use either the ______ or ______ scale of measurement.

Accepted Answer

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

Question 19

Data collected at the same, or approximately the same, point in time are

Accepted Answer

A) time series data 
B) static data 
C) cross-sectional data 
D) one-dimensional data 
A) time series data 
B) static data 
C) cross-sectional data 
D) one-dimensional data

Question 20

Which of the following is an example of categorical data?

Accepted Answer

A) social security number 
B) score on a multiple-choice exam 
C) height, in meters, of a diving board 
D) number of square feet of carpet 
A) social security number 
B) score on a multiple-choice exam 
C) height, in meters, of a diving board 
D) number of square feet of carpet

In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of a

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

Statistical inference

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

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

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. The 45% approval is an example of

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 manager's statement that 60% of Daisy City's 3,000 homes are in violation of city codes is

The entities on which data are collected are

Categorical data

The set of measurements collected for a particular element is (are) called

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

The most common type of observational study is

__________ is a spreadsheet package.

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

The Department of Transportation of a city has noted that on the average there are 14 accidents per day. The average number of accidents is an example of

Categorical data use either the or scale of measurement.

Data collected at the same, or approximately the same, point in time are

Which of the following is an example of categorical data?

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

In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of a

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

Statistical inference

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

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

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. The 45% approval is an example of

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 manager's statement that 60% of Daisy City's 3,000 homes are in violation of city codes is

The entities on which data are collected are

Categorical data

The set of measurements collected for a particular element is (are) called

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

The most common type of observational study is

__________ is a spreadsheet package.

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

The Department of Transportation of a city has noted that on the average there are 14 accidents per day. The average number of accidents is an example of

Categorical data use either the ______ or ______ scale of measurement.

Data collected at the same, or approximately the same, point in time are

Which of the following is an example of categorical data?

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

Categorical data use either the or scale of measurement.