Question

Please help!

For questions 5-8, there is a large city school system with 20 elementary schools, and the school board is considering the adoption of a new policy that would require elementary students to pass a test in order to be promoted to the next grade. The PTA wants to find out whether parents agree with this plan by trying various methods for surveying parents. Identify the tye of bias that may be present in the given scenario.

A. undercoverage
B. voluntary response bias
C. response bias
D. nonresponse bias

1. The PTA puts a big ad in the newspaper asking people to log their opinions on the PTA website

2. The PTA randomly selects 20 parents each elementary school and sends them a survey. Of the 400 parents selected, only 50 parents return the survey

3.The PTA has elementary school students go to randomly selected homes and ask the following question, "should I have to pass a high-stakes test in order to remain with my classmates?"

4. The PTA randomly selects one elementary school and surveys 100 third grade parents.

Answer 1

Step-by-step explanation:

1. The type of bias that may be present in this scenario is voluntary response bias. This is because the survey is being conducted through the PTA website, and people are only responding if they choose to. This can lead to a biased sample as those who have strong opinions, either in favor or against the new policy, may be more likely to respond, while others may choose not to participate.

2. The type of bias that may be present in this scenario is nonresponse bias. This is because only 50 out of the 400 parents selected returned the survey. The nonresponse rate is high, and those who did not respond may have different opinions than those who did. This can lead to a biased sample and inaccurate results.

3. The type of bias that may be present in this scenario is undercoverage. This is because the PTA is having elementary school students go to randomly selected homes to ask the question. This method may not reach all parents in the school system, as some parents may not be at home when the students come to their house. This can lead to a biased sample as those who are not reached may have different opinions than those who are.

4. The type of bias that may be present in this scenario is response bias. This is because the PTA is randomly selecting one elementary school and surveying 100 third-grade parents. However, the opinions of third-grade parents may not be representative of all parents in the school system. This can lead to a biased sample and inaccurate results if the opinions of other grade levels are not considered.

Hope this helps.

Answer 2

A. undercoverage- 4. The PTA randomly selects one elementary school and surveys 100 third grade parents.

B. voluntary response bias- 1. The PTA puts a big ad in the newspaper asking people to log their opinions on the PTA website

C. response bias- 3.The PTA has elementary school students go to randomly selected homes and ask the following question, "should I have to pass a high-stakes test in order to remain with my classmates?"

D. nonresponse bias- 2. The PTA randomly selects 20 parents each elementary school and sends them a survey. Of the 400 parents selected, only 50 parents return the survey

Step-by-step explanation:

Undercoverage bias occurs when a part of the population is excluded from your sample.

Voluntary response biases in surveys occur when your sample is made of people who have volunteered to take part in the survey.

Response bias describes situations where people do not answer questions truthfully for some reason.

Nonresponse bias occurs when survey participants are unwilling or unable to respond to a survey question or an entire survey.