This response indicates an incomplete application of a reasonable strategy. The student correctly chooses Method C as providing a simple random sample but a justification addressing equal chance and independence is missing. The justification for why Method A will not provide a simple random sample is correct (that will limit the principal to one group of student in one cafeteria period). A correct justification is also given for why Method B will not give a simple random sample (the principal will be limited to only eleventh graders with certain teachers). The response demonstrates a conceptual understanding and analysis of the problem.
view all anchor papers at this score level
|
