Question 1

Which of the following describes selection bias?
A) A leading question is selected for inclusion in the survey.
B) Some members of the target population are excluded from possible selection for the sample.
C) A person selected for the sample has a biased opinion about the survey.
D) All of these choices are true.

Accepted Answer

Selection bias refers to the bias that can occur when some members of the target population are excluded from possible selection for the sample. This can result in a sample that is not representative of the target population, leading to inaccurate conclusions. While all of the choices listed may potentially lead to bias in survey results, only option B specifically describes selection bias.

Question 2

____________________ error results from the failure to collect data from all subjects in the sample.

Accepted Answer

The answer of ____________________ error results from the failure to...

Question 3

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 answer of The Chairman of a College of Business...

Question 4

To give away a door prize,the hostess of a Tupperware party put each person's name into a hat,mixed them up,and selected one name.What sampling method was used?
A) Simple random sample
B) Systematic sample
C) Stratified random sample
D) Cluster sample

Accepted Answer

Each person's name had an equal chance of being selected, making it a simple random sample.

Question 5

A(n)____________________ sample is obtained by separating the population into groups and taking a simple random sample from each group.

Accepted Answer

The answer of A(n)____________________ sample is obtained by separating the...

Question 6

Is it possible for a sample to yield better results than a census,from a practical standpoint? Explain.

Accepted Answer

The answer of Is it possible for a sample to...

Question 7

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

The answer of A regular feature in many newspapers asks...

Question 8

Proper interviewer training helps to reduce ____________________ error.

Accepted Answer

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

Question 9

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

Accepted Answer

The answer of Give an example of a poll that...

Question 10

Pollsters want to know what percentage of all registered voters in Missoula,Montana,intend to vote in the next election.They visit with 350 people at the downtown shopping mall during one afternoon and ask each person whether or not they intend to vote.Are the target population and the sampled population the same in this case? Explain.

Accepted Answer

The answer of Pollsters want to know what percentage of...

Question 11

____________________ sampling is particularly useful when it is difficult or costly to develop a complete list of the population members.

Accepted Answer

The answer of ____________________ sampling is particularly useful when it...

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

A senator wants to estimate the mean age of registered voters in her state.Unfortunately,she does not have a complete list of households in her state.Describe a sampling plan that would be suitable for her purposes.

Accepted Answer

The answer of A senator wants to estimate the mean...

Question 14

____________________ error refers to differences between the sample and the population.

Accepted Answer

The answer of ____________________ error refers to differences between the...

Question 15

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

Accepted Answer

The answer of What is meant by a self-selected sample?...

Question 16

Excluding some members of the target population results in ____________________ bias.

Accepted Answer

The answer of Excluding some members of the target population...

Quiz 5: Data Collection and Sampling

Which of the following describes selection bias?