Question 1

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 2

Which of the following yields a simple random sample?

Accepted Answer

This is the only option that involves random selection without any bias. Each student has an equal chance of being selected, and the selection process does not depend on any other criteria. Option A has a systematic selection method, making it non-random. Option B relies on the instructor's opinion, which can introduce bias into the selection process. Option D involves selecting a group, which may not necessarily represent the entire population of students.

Question 3

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 sample is stratified because it includes 100 students randomly selected from each of the freshman, sophomore, junior, and senior classes. This ensures that the sample is representative of each class and provides equal representation from each group.

Question 4

A sample of 300 subscribers to a particular magazine is selected from a population frame of 9,000 subscribers.If,upon examining the data,it is determined that no subscriber had been selected in the sample more than once,

Accepted Answer

The answer of A sample of 300 subscribers to a...

Question 5

Which of the following yields a simple random sample?

Accepted Answer

Choice C involves a simple random sample as each student has an equal chance of being selected, and the selection process does not involve any bias or predetermined criteria.

Question 6

To demonstrate a sampling method,the instructor in a class picked the first 5 students sitting in the last row of the class.This is an example of a

Accepted Answer

This is an example of a convenience sample as the instructor simply picked the first 5 students they saw in a convenient location (the last row). It is not a systematic sample as there is no specific pattern or system being used to select the sample. It is not a simple random sample as there is no randomization involved in selecting the sample. It is not a stratified sample as the students are not being intentionally selected based on specific strata or categories.

Question 7

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 an example of a judgment sample because the publishing company specifically selected faculty members who have adopted one of their textbooks to gather information on their preferences for another textbook. The sample is not random or systematic, and it is not stratified because the faculty members were not chosen based on any particular characteristic or attribute.

Question 8

Which of the following yields a systematic sample?

Accepted Answer

A systematic sample involves selecting every kth element from a population. In this scenario, the first student is chosen at random, and then every 15th student afterwards is selected, resulting in a systematic sample. B involves subjective criteria by the instructor, while C involves stratified sampling and selecting separate samples from different groups. D is a simple random sample, not a systematic sample.

Question 9

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 evening host mixed all the tickets around before selecting the ticket for the door prize. This means that every ticket had an equal chance of being selected, which is the definition of a simple random sample. The other sampling methods (systematic, stratified, and cluster) involve some form of deliberate selection or grouping, which was not present in this scenario.

Question 10

Which of the following sampling methods is a probability sample?

Accepted Answer

A stratified sample is a probability sample in which the population is divided into subgroups, or strata, based on certain characteristics, such as age or income, and a random sample is then taken from each stratum. This ensures that each stratum is represented in the sample and allows for more accurate generalizations to be made about the entire population. Convenience, quota, and judgment sampling are all non-probability sampling methods.

Question 11

Which of the following is not a reason for selecting a sample?

Accepted Answer

Selecting a sample is done precisely to obtain a good representation of the target population, so option C contradicts the very purpose of selecting a sample. Options A, B, and D are valid reasons for selecting a 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

Only a probability sample allows for accurate statistical inference from the sample to the larger population. Judgment samples, quota samples, and convenience samples may not accurately reflect the characteristics of the larger population, and therefore the results cannot be confidently generalized.

Question 13

Which of the following yields a cluster sample?

Accepted Answer

In a cluster sample, the population is divided into groups or clusters and a random sample of clusters is selected. In this case, the clusters are the groups of students seated in rows and one of the groups is randomly selected. This is different from stratified sampling (Option C), where the population is divided into subgroups and a random sample is selected from each subgroup. Option A is an example of systematic sampling and Option B is an example of purposive or judgmental sampling.

Question 14

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

This is an example of a judgment sample because the legislators are specifically selecting participants who they believe are knowledgeable and representative of the community that will be affected by the new zoning law. They are using their judgment to select the appropriate participants rather than choosing them randomly or systematically.

Question 15

Which of the following yields a stratified sample?

Accepted Answer

Stratified sampling involves dividing the population into homogeneous subgroups, or strata, and then selecting a random sample from each stratum. In option C, the population is divided into strata based on gender, and a random sample is selected from each stratum (males and females). Therefore, option C yields a stratified sample. Option A is systematic sampling, option B is subjective sampling, and option D is simple random sampling.

Question 16

At US Data Corporation's website,they advertised that "Because of our commitment to quality and our vast amount of industry knowledge and experience,we have grown to be one of America's leading providers of mailing lists,marketing data,sales leads and research data.We maintain databases of information on consumers and businesses nationwide that set industry standards for mission critical currency,reliability and accuracy." Trying to reach 500 potential donors for their annual phone donation campaign,a local fire department purchased a list of donors from the company.This list is an example of a

Accepted Answer

The list of donors purchased from US Data Corporation is an example of a frame, which is a list of all the individuals or units in a population that can be used to select a sample. In this case, the fire department purchased a list of potential donors from the company to use for their phone donation campaign.

Question 17

Which of the following scenarios will yield a nonprobability sample?

Accepted Answer

Nonprobability sampling involves choosing items or individuals without regard to their probability of occurrence. Option B states that items or individuals are chosen without regard to their probability of occurrence, hence it is a nonprobability sample. The other options describe probability sampling methods.

Question 18

A company selling apparel online sends out emails every Monday to all its customers who made a purchase.This is an example of a

Accepted Answer

This is an example of a convenience sample as the company is only sending emails to customers who have already made a purchase, rather than selecting a random sample from their entire customer base.

Question 19

To obtain a sample of 10 books in the store,the manager walked to the first shelf next to the cash register to pick the first 10 books on that shelf.This is an example of a

Accepted Answer

This is a convenience sample as the manager is selecting books that are close to them and easily accessible, rather than randomly selecting from the entire store or using a systematic or stratified sampling method.

Question 20

The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a Blu-ray player made by the company over the past 12 months are satisfied with their products.Which of the following will be a good frame for drawing a sample?

Accepted Answer

The list of customers who returned the registration card is the best choice for drawing a sample because this list includes only customers who have already purchased a Blu-ray player from the company, making them the most relevant population for the study. Additionally, these customers have already expressed some level of engagement with the company by returning the registration card, which may make them more likely to respond to a survey about their satisfaction with the product. The other options (telephone directory, voting registry, list of potential customers purchased from a database marketing company) are not as relevant or targeted to the population of interest.

Quiz 1: Defining and Collecting Data

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 yields a simple random sample?

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?

A sample of 300 subscribers to a particular magazine is selected from a population frame of 9,000 subscribers.If,upon examining the data,it is determined that no subscriber had been selected in the sample more than once,

Which of the following yields a simple random sample?

To demonstrate a sampling method,the instructor in a class picked the first 5 students sitting in the last row of the class.This is an example of a

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

Which of the following yields a systematic 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 sampling methods is a probability sample?

Which of the following is not a reason for selecting a 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?

Which of the following yields a cluster sample?

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

Which of the following yields a stratified sample?

Which of the following scenarios will yield a nonprobability sample?

A company selling apparel online sends out emails every Monday to all its customers who made a purchase.This is an example of a

To obtain a sample of 10 books in the store,the manager walked to the first shelf next to the cash register to pick the first 10 books on that shelf.This is an example of a