Question 1

"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 2

List one advantage and one disadvantage of a personal interview as a method of data collection.

Accepted Answer

Advantages: It has a higher expected res

Question 3

Nonresponse error occurs when someone was not selected to participate in the survey.

Accepted Answer

A) True 
 B)False

Question 4

An observational study involves collecting data about persons or objects by recording information about their selected characteristics of interest.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

A cluster sample occurs when you randomly select groups,and for each group selected,you sample every single member of that group.

Accepted Answer

A) True 
 B)False

Question 7

Briefly discuss three methods of conducting a survey of people.

Accepted Answer

​ a. Personal interview: involves an int

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Smoking and Heart Attacks ​ A medical researcher is interested in investigating the relationship between smoking and heart attacks ​ ​
-{Smoking and Heart Attacks Narrative} What type of studies are plausible in this particular scenario,observational studies or experiments?

Accepted Answer

Observational studies are the

Question 11

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 resul

Question 12

A marketing research firm selects a random sample of adults and asks them a list of questions regarding their beverage preferences. What type of data collection is involved here?

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 13

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

Accepted Answer

A) True 
 B)False

Question 14

What is meant by a self-selected sample? Why are self-selected samples not desirable?

Accepted Answer

A self-selected sample is a sample forme

Question 15

Selection bias is a systematic tendency to favor including individuals with particular characteristics,while excluding individuals with other characteristics.

Accepted Answer

A) True 
 B)False

Question 16

The Chairman of a College of Business with five departments wants to estimate the average number of student-hours lost per month due to illness of their professors.Describe a sampling plan that will help the Dean compare the average student-loss hours for the five departments.

Accepted Answer

The Chairman can take one simp

Question 17

Smoking and Heart Attacks ​ A medical researcher is interested in investigating the relationship between smoking and heart attacks ​ ​
-{Smoking and Heart Attacks Narrative} Briefly describe how the researcher might design an observational study to investigate the relationship between smoking and heart attacks

Accepted Answer

Randomly sample a group of smokers and r

Question 18

The personnel director at a large company studied the eating habits of the company's employees.The director watched and recorded whether each employee brought his/her own lunch to work,
Ate at the company cafeteria,or went out to lunch.What method of data collection was used here?

Accepted Answer

A) Direct observation. 
B) An experiment. 
C) A survey. 
D) A personal interview. 
A) Direct observation. 
B) An experiment. 
C) A survey. 
D) A personal interview.

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

List one advantage and one disadvantage of a telephone interview as a method of data collection.

Accepted Answer

Advantage: It is usually less expensive

Exam 5: Data Collection and Sampling

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

List one advantage and one disadvantage of a personal interview as a method of data collection.

Nonresponse error occurs when someone was not selected to participate in the survey.

An observational study involves collecting data about persons or objects by recording information about their selected characteristics of interest.

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

A cluster sample occurs when you randomly select groups,and for each group selected,you sample every single member of that group.

Briefly discuss three methods of conducting a survey of people.

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

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

Smoking and Heart Attacks ​ A medical researcher is interested in investigating the relationship between smoking and heart attacks ​ ​ -{Smoking and Heart Attacks Narrative} What type of studies are plausible in this particular scenario,observational studies or experiments?

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.

A marketing research firm selects a random sample of adults and asks them a list of questions regarding their beverage preferences. What type of data collection is involved here?

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

What is meant by a self-selected sample? Why are self-selected samples not desirable?

Selection bias is a systematic tendency to favor including individuals with particular characteristics,while excluding individuals with other characteristics.

The Chairman of a College of Business with five departments wants to estimate the average number of student-hours lost per month due to illness of their professors.Describe a sampling plan that will help the Dean compare the average student-loss hours for the five departments.

The personnel director at a large company studied the eating habits of the company's employees.The director watched and recorded whether each employee brought his/her own lunch to work, Ate at the company cafeteria,or went out to lunch.What method of data collection was used here?

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

List one advantage and one disadvantage of a telephone interview as a method of data collection.

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

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

Model Building

Nonparametric Statistics

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

Smoking and Heart Attacks A medical researcher is interested in investigating the relationship between smoking and heart attacks -{Smoking and Heart Attacks Narrative} What type of studies are plausible in this particular scenario,observational studies or experiments?