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I introduced some treatment to a school (let’s say PS142) and I want to know if my treatment improved students’ math scores compared to the control group. PS142 has 10% minority students and 15 % low income students.

NYC department of education lists 30 peer schools that closely match PS142 on specific characteristics (in terms of % minority and % low income). I don’t want to compare PS142 to all 30 peer schools. I want to just choose 5 or 6 schools from the list of 30 schools. How do I do this? What would be the best method?

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  • $\begingroup$ Why is it difficult to obtain scores from these schools? $\endgroup$
    – AdamO
    Commented Nov 18, 2015 at 20:50

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Why not just compare it to the mean of the other schools (using a t-test)? You could first look for and omit any outliers from the control group perhaps.

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  • $\begingroup$ Thanks for your response DaGu. Yes I thought about making comparison based on the mean of other schools. The reason I want to just choose 5 or 6 schools from the list is to reduce workload/save time. I want to look up stats for just a few schools vs. 30 schools ( I have a lot of analyses to run!). nj $\endgroup$
    – Nora Jones
    Commented Nov 18, 2015 at 20:21

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