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What statistical test should I use?

I am new to statistics. I have a data set evaluating class size (med-school level) to exam performance. When graphed, it appears that lower class sizes have worse performance and also larger variability than larger class sizes. Possibly due to less resources? 1. What test should I use to evaluate significance of the data set? I am just looking at this single data set and not really comparing it to anything else. 2. What statistical test should I use to describe that the variance at lower class sizes is greater than the variance at larger class sizes? Thank you!

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Ray Finkle

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โˆ™ 2023-01-30 19:26:13

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