In a large city school system with 38 elementary schools, the school board is co

Question

In a large city school system with 38 elementary schools, 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. Listed below are some of the ideas proposed for gathering data. For each, indicate what kind of sampling strategy is involved and what (if any) biases might result. Assume the schools are homogeneous and differ from each other a) Put a big ad in the newspaper asking people to log their opinions on the PTA Web site. Which kind of sampling strategy is involved? 0 A. O B. This sampling strategy is systematic sampling. This sampling strategy is cluster sampling C. This sampling strategy is a simple random sample This sampling strategy is a voluntary response sample D. What kind of bias (if any) is most likely to result? A. Voluntary response bias will result since only parents who teel strongly about the issue will respond. B. Undercoverage bias could result since the parents in the sample may not be representative or all parents. Bias could result only if the sampling strategy is not followed as described C. D. Response bias could result since the PTA wants parents to agree to this plan b) Randomly select one of the neighborhoods and contact the parents of every student. Which knd of samplingstate gy is involved? A. This sampling strategy is cluster sampling. B. This sampling strategy is a voluntary response sample O C. This sampling strategy is strabfied sampling. Click to select your answer

Explanation / Answer

Q)what kind of sampling strategy is involved:

The sampling strategy is a voluntary response strategy.

Q) What kind of a bias is most likely to result?

Option A is right

b)Option C is right.This is an example of stratified smapling

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