Which of the choices describes the possible kind of bias that might be present if a teacher

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Question:

Which of the choices describes the possible kind of bias that might be present if a teacher decides that instead of randomly selecting students to ask how they feel about the course the teacher instead asks students to go online and fill out a survey?

options:

voluntary response sample - the bias would probably be towards those students who strongly enjoy the course, and these students would rate the course more favorably.

voluntary response sample - the bias would probably be towards those students who strongly dislike the course, and these students would rate the course unfavorable.

voluntary response sample - the bias would probably be towards those students who either strongly enjoy the course or strongly dislike the course, and these students would rate the course more favorably or less favorably.

Convenience sample - the bias would probably be towards students who happen to attend a class that day. They may enjoy the course more than students who are skipping class!

2.)

Suppose a school district decides to randomly test high school students for attention deficit disorder (ADD). There are three high schools in the district, each with grades 9-12. The school board pools all of the students together and randomly samples 250 students. Is this a simple random sample?

options:

Yes, because each student is equally likely to be chosen.

No, because we can't guarantee that students from each grade in the sample.

No, because we can't guarantee that students from each school in the sample.

Yes, because they could have chosen any 250 students from the district.

Yes, because the students were chosen at random.

3.)

A chemistry professor who teaches a large lecture class surveys his students who attend his class about how he can make the class more interesting, hoping he can get more students to attend. The survey is optional and will be available online. Students will remain anonymous. Which of the following is the most relevant source of bias.

options:

Undercoverage.

None of these.

Nonresponse Bias

Response Bias

Voluntary Response Bias

4.)

Identify the sampling method that best describes the situation below.

A small town has 250 residents who live in the central region, 150 in the eastern, 50 in the northern, 115 in the southern, and 300 in the western. The local paper wants to know if the residents are pleased with their current price for the paper. The paper chooses 10 male and 10 female residents from each region for the survey.

Which of the following is the sampling method for the scenario described above?

options:

Census

Stratified Sampling

Quota Sampling

Convenience Sampling

Simple Random Sample

5.)

Name the sampling method that best fits the scenario below.

A student in a large lecture class wants to know how the rest of the class did on the last exam. She asks several of the students to share their score who are sitting around her. Based on that information she concludes she did fairly well.

Choose the correct sampling method below.

options: