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A school district estimates average test scores using two alternative designs:
Design A: Simple random sample of 400 students from 80,000
Design B: Cluster sample of 8 schools, then 50 students per school (400 total)
The intraclass correlation for test scores within schools is . Using the design effect formula where is cluster size, what is the ratio ?
A school district estimates average test scores using two alternative designs:
Design A: Simple random sample of 400 students from 80,000
Design B: Cluster sample of 8 schools, then 50 students per school (400 total)
The intraclass correlation for test scores within schools is . Using the design effect formula where is cluster size, what is the ratio ?