Question 1

Since a _______ is not a randomly selected probability sample, there is no way to know how
Well it represents the overall population.

Accepted Answer

A convenience sample is not a randomly selected probability sample, so there is no way to know how well it represents the overall population.

Question 2

Which of the following yields a simple random sample?

Accepted Answer

In option C, each student has an equal chance of being selected, and the selection is done randomly without replacement, which is the definition of a simple random sample.

Question 3

Which of the following sampling methods will more likely be susceptible to ethical violation
When used to form conclusions about the entire population?

Accepted Answer

Convenience sampling is more susceptible to ethical violations because it involves selecting samples based on ease of access, which can lead to biased results and may not accurately represent the entire population.

Question 4

To find out the potential impact of a new zoning law on a neighborhood, the legislators conduct
A focus group interview by inviting the members of the housing owners association of that
Neighborhood.This is an example of a

Accepted Answer

A judgment sample is when the sample is selected based on the judgment of the researcher, in this case, the legislators chose the housing owners association members as they believe they represent the neighborhood.

Question 5

The Dean of Students mailed a survey to a total of 400 students.The sample included 100
Students randomly selected from each of the freshman, sophomore, junior, and senior classes on
Campus last term.What sampling method was used?

Accepted Answer

The sampling method used is a stratified sample because the students were divided into strata (freshman, sophomore, junior, and senior classes) and then a random sample was taken from each stratum.

Question 6

Which of the following yields a systematic sample?

Accepted Answer

A systematic sample is one where we take every kth element from a population. In this case, the population is the entire class and we are taking every 15th student after randomly selecting the first student from the first group. This ensures that every student in the class has an equal chance of being selected for the sample.

Question 7

Which of the following yields a stratified sample?

Accepted Answer

Stratified sampling involves dividing a population into subgroups or strata and then randomly sampling from each stratum. Option C involves dividing the class into subgroups based on gender and then randomly selecting samples from each subgroup. Therefore, it yields a stratified sample. Options A, B and D do not involve dividing the population into distinct subgroups and randomly sampling from each subgroup, so they do not yield a stratified sample.

Question 8

A population frame for a survey contains a listing of 6,179 names.Using a table of random
Numbers, which of the following code numbers will appear on your list?

Accepted Answer

The code number should be a four-digit number since the population frame has 6,179 names. Therefore, 0694 is a valid code number.

Question 9

Which of the following yields a cluster sample?

Accepted Answer

In a cluster sample, the population is divided into clusters or groups and a random sample of clusters are selected. Within each selected cluster, all members are included in the sample. Choice D is the only option that divides the population into groups (rows), with one group randomly selected. The other options involve individual selection (choice A), subjective selection based on a specific criteria (choice B), or stratified sampling (choice C).

Question 10

The evening host of a dinner dance reached into a bowl, mixed all the tickets around, and
Selected the ticket to award the grand door prize.What sampling method was used?

Accepted Answer

The host mixed all the tickets and selected one at random, which is characteristic of a simple random sample.

Question 11

Which of the following yields a simple random sample?

Accepted Answer

In option C, each student has an equal chance of being selected, and the selection is done randomly with replacement, which is characteristic of a simple random sample.

Question 12

Which of the following types of samples can you use if you want to make valid statistical
Inferences from a sample to a population?

Accepted Answer

A probability sample is the only type that allows for valid statistical inferences to be made about a population because it involves random selection, ensuring that every member of the population has a known, non-zero chance of being included.

Question 13

True or False: As a population becomes large, it is usually better to obtain statistical
information from the entire population.

Accepted Answer

Surveying an entire population can be impractical and costly; sampling is often more efficient and sufficient for statistical analysis.

Question 14

A population frame for a survey contains a listing of 72,345 names.Using a table of random
Numbers, how many digits will the code numbers for each member of your population contain?

Accepted Answer

To uniquely identify each of the 72,345 members, you need a 5-digit code, as 5 digits can represent numbers from 00000 to 99999, which is sufficient to cover all 72,345 individuals.

Question 15

To gather information on the preferences of instructors at universities on topics for a business
Statistics textbook that it will publish, a publishing company invited 10 faculty members who
Have adopted one of the textbooks that it has published.This is an example of a

Accepted Answer

This is a judgment sample because the publishing company selected faculty members who have already adopted one of its textbooks, rather than randomly selecting from the entire population of instructors.

Question 16

A telemarketer set the company's computerized dialing system to contact every 25th person
Listed in the local telephone directory.What sampling method was used?

Accepted Answer

Systematic sampling is a method of sampling in which every kth element of a population is selected. In this case, the telemarketer selected every 25th person listed in the local telephone directory.

Question 17

Which of the following sampling methods will more likely be susceptible to ethical violation?

Accepted Answer

Convenience sampling involves selecting individuals who are easy to reach or readily available, which can lead to bias and ethical concerns. This is because the sample may not be representative of the population and excluded groups may be unfairly underrepresented. Both simple random sampling and stratified sampling are considered more fair and unbiased methods, while cluster sampling can vary depending on the specific approach.

Question 18

For a population frame containing N = 1,007 individuals, what code number should you assign
To the first person on the list in order to use a table of random numbers?

Accepted Answer

The answer of For a population frame containing N =...

Question 19

Which of the following can be reduced by proper interviewer training?

Accepted Answer

Proper interviewer training can reduce measurement error by ensuring that interviewers collect data consistently and accurately. Sampling error is related to the sample selection process, not interviewer training.

Question 20

Which of the following sampling methods will more likely be susceptible to ethical violation
When used to form conclusions about the entire population?

Accepted Answer

Judgment sampling relies on the subjective judgment of the researcher, which can introduce bias and ethical concerns, as it may not accurately represent the entire population.

Quiz 1: Defining and Collecting Data

Since a _______ is not a randomly selected probability sample, there is no way to know how Well it represents the overall population.

Which of the following yields a simple random sample?

Which of the following sampling methods will more likely be susceptible to ethical violation When used to form conclusions about the entire population?

To find out the potential impact of a new zoning law on a neighborhood, the legislators conduct A focus group interview by inviting the members of the housing owners association of that Neighborhood.This is an example of a

The Dean of Students mailed a survey to a total of 400 students.The sample included 100 Students randomly selected from each of the freshman, sophomore, junior, and senior classes on Campus last term.What sampling method was used?

Which of the following yields a systematic sample?

Which of the following yields a stratified sample?

A population frame for a survey contains a listing of 6,179 names.Using a table of random Numbers, which of the following code numbers will appear on your list?

Which of the following yields a cluster sample?

The evening host of a dinner dance reached into a bowl, mixed all the tickets around, and Selected the ticket to award the grand door prize.What sampling method was used?

Which of the following yields a simple random sample?

Which of the following types of samples can you use if you want to make valid statistical Inferences from a sample to a population?

True or False: As a population becomes large, it is usually better to obtain statistical information from the entire population.

A population frame for a survey contains a listing of 72,345 names.Using a table of random Numbers, how many digits will the code numbers for each member of your population contain?

To gather information on the preferences of instructors at universities on topics for a business Statistics textbook that it will publish, a publishing company invited 10 faculty members who Have adopted one of the textbooks that it has published.This is an example of a

A telemarketer set the company's computerized dialing system to contact every 25th person Listed in the local telephone directory.What sampling method was used?

Which of the following sampling methods will more likely be susceptible to ethical violation?

For a population frame containing N = 1,007 individuals, what code number should you assign To the first person on the list in order to use a table of random numbers?

Which of the following can be reduced by proper interviewer training?

Which of the following sampling methods will more likely be susceptible to ethical violation When used to form conclusions about the entire population?