2. A study is conducted among federally funded high schools. The response variable is MathAch (math achievement score where higher scores are better) and recorded predictor variables are Sex (Female or Male), and SES (Socioeconomic status). This is an example of clustered data where we assume measurements may be correlated within a school (so School takes the place of the “individual" in longitudinal data). Explain why a compound symmetry structure for the variance-covariance of measurements within a school is a reasonable assumption.

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2. A study is conducted among federally funded high schools. The response variable is MathAch
(math achievement score where higher scores are better) and recorded predictor variables are Sex
(Female or Male), and SES (Socioeconomic status). This is an example of clustered data where
we assume measurements may be correlated within a school (so School takes the place of the
"individual" in longitudinal data).
Explain why a compound symmetry structure for the variance-covariance of measurements within
a school is a reasonable assumption.
Transcribed Image Text:2. A study is conducted among federally funded high schools. The response variable is MathAch (math achievement score where higher scores are better) and recorded predictor variables are Sex (Female or Male), and SES (Socioeconomic status). This is an example of clustered data where we assume measurements may be correlated within a school (so School takes the place of the "individual" in longitudinal data). Explain why a compound symmetry structure for the variance-covariance of measurements within a school is a reasonable assumption.
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