UniODA vs. Polychoric Correlation: Number of Lambs Born Over Two Years

Paul R. Yarnold

Optimal Data Analysis, LLC

This study assesses agreement between number of lambs born to 227 ewes over two consecutive years. Polychoric correlation could not be validly used to assess agreement because underlying distributional assumptions were violated. Requiring no distributional assumptions, UniODA identified moderate, statistically significant agreement.

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