Question 1

Gender, occupation, and age are all examples of ____________________ variables.

Accepted Answer

demographic

Question 2

A regular feature in many newspapers asks readers to respond via e-mail to a survey question.The percentages of yes and no responses are usually reported the following day.Should we ignore the results of these surveys? Explain.

Accepted Answer

Yes, we should ignore the results because this is an example of a self-selected sample.Self-selected samples are almost always biased because they tend to only represent those with strong opinions.

Question 3

Soft Drinks
A soft drink manufacturer has been supplying its products in bottles to grocery stores and in cans to small convenience stores.The company is analyzing sales of this product to determine which type of packaging is preferred by customers.
-{Soft Drink Narrative} Is this study observational or experimental? Explain.

Accepted Answer

The study is observational.The statistics practitioner did not randomly assign stores to selling bottles or cans.Type of store and type of packaging cannot be separated here.

Question 4

When responses are not obtained from some members of the sample, bias is introduced.

Accepted Answer

A) True 
 B)False

Question 5

Proper interviewer training helps to reduce ____________________ error.

Accepted Answer

The answer of Proper interviewer training helps to reduce ____________________...

Question 6

Which method of data collection is involved when a researcher counts and records the number of students wearing backpacks on campus in a given day?

Accepted Answer

A)  An experiment. 
B)  A survey. 
C)  Direct observation. 
D)  None of these choices. 
A)  An experiment. 
B)  A survey. 
C)  Direct observation. 
D)  None of these choices.

Question 7

Selection bias occurs when researchers select biased questions to include on a survey.

Accepted Answer

A) True 
 B)False

Question 8

Give an example of a poll that involves a self-selected sample.

Accepted Answer

Choose any recent radio or tel

Question 9

The target population is the population about which we want to draw inferences and conclusions, while the sampled population is the actual population from which the sample has been taken.

Accepted Answer

A) True 
 B)False

Question 10

Briefly discuss three methods of conducting a survey of people.

Accepted Answer

a.
Personal interview: involves an inter

Question 11

A question on a survey that was not answered is an example of an open-ended question.

Accepted Answer

A) True 
 B)False

Question 12

____________________ error is due to mistakes made in the acquisition of data.

Accepted Answer

The answer of ____________________ error is due to mistakes made...

Question 13

Which of the following causes sampling error?

Accepted Answer

A)  Taking a random sample from a population instead of studying the entire population. 
B)  Making a mistake in the process of collecting the data. 
C)  Nonresponse bias. 
D)  All of these choices are true. 
A)  Taking a random sample from a population instead of studying the entire population. 
B)  Making a mistake in the process of collecting the data. 
C)  Nonresponse bias. 
D)  All of these choices are true.

Question 14

A target population and a sampled population mean the same thing.

Accepted Answer

A) True 
 B)False

Question 15

The ____________________ rate is the proportion of people in the sample who completed the survey.

Accepted Answer

The answer of The ____________________ rate is the proportion of...

Question 16

The difference between a sample mean and the population mean is called:

Accepted Answer

A)  nonresponse error. 
B)  selection bias. 
C)  sampling error. 
D)  nonsampling error. 
A)  nonresponse error. 
B)  selection bias. 
C)  sampling error. 
D)  nonsampling error.

Question 17

A self-selected sample is one in which the individuals choose themselves to be in the sample.

Accepted Answer

A) True 
 B)False

Question 18

"Wouldn't you agree that foreign cars are better than American cars?" is an example of a well-worded survey question.

Accepted Answer

A) True 
 B)False

Question 19

Nonresponse error occurs when responses are not obtained from some members of the sample.

Accepted Answer

A) True 
 B)False

Question 20

The larger the sample size is, the more accurate we can expect our sample estimates to be.

Accepted Answer

A) True 
 B)False

Gender, occupation, and age are all examples of ____________________ variables.

A regular feature in many newspapers asks readers to respond via e-mail to a survey question.The percentages of yes and no responses are usually reported the following day.Should we ignore the results of these surveys? Explain.

When responses are not obtained from some members of the sample, bias is introduced.

Proper interviewer training helps to reduce ____________________ error.

Which method of data collection is involved when a researcher counts and records the number of students wearing backpacks on campus in a given day?

Selection bias occurs when researchers select biased questions to include on a survey.

Give an example of a poll that involves a self-selected sample.

The target population is the population about which we want to draw inferences and conclusions, while the sampled population is the actual population from which the sample has been taken.

Briefly discuss three methods of conducting a survey of people.

A question on a survey that was not answered is an example of an open-ended question.

____________________ error is due to mistakes made in the acquisition of data.

Which of the following causes sampling error?

A target population and a sampled population mean the same thing.

The ____________________ rate is the proportion of people in the sample who completed the survey.

The difference between a sample mean and the population mean is called:

A self-selected sample is one in which the individuals choose themselves to be in the sample.

"Wouldn't you agree that foreign cars are better than American cars?" is an example of a well-worded survey question.

Nonresponse error occurs when responses are not obtained from some members of the sample.

The larger the sample size is, the more accurate we can expect our sample estimates to be.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

Numerical Descriptive Techniques

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Filters

Exam 5: Data Collection and Sampling

Gender, occupation, and age are all examples of ____________________ variables.

A regular feature in many newspapers asks readers to respond via e-mail to a survey question.The percentages of yes and no responses are usually reported the following day.Should we ignore the results of these surveys? Explain.

When responses are not obtained from some members of the sample, bias is introduced.

Proper interviewer training helps to reduce ____________________ error.

Which method of data collection is involved when a researcher counts and records the number of students wearing backpacks on campus in a given day?

Selection bias occurs when researchers select biased questions to include on a survey.

Give an example of a poll that involves a self-selected sample.

The target population is the population about which we want to draw inferences and conclusions, while the sampled population is the actual population from which the sample has been taken.

Briefly discuss three methods of conducting a survey of people.

A question on a survey that was not answered is an example of an open-ended question.

____________________ error is due to mistakes made in the acquisition of data.

Which of the following causes sampling error?

A target population and a sampled population mean the same thing.

The ____________________ rate is the proportion of people in the sample who completed the survey.

The difference between a sample mean and the population mean is called:

A self-selected sample is one in which the individuals choose themselves to be in the sample.

"Wouldn't you agree that foreign cars are better than American cars?" is an example of a well-worded survey question.

Nonresponse error occurs when responses are not obtained from some members of the sample.

The larger the sample size is, the more accurate we can expect our sample estimates to be.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

Numerical Descriptive Techniques

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Filters