To identify customers with extremely high claims of fish mortalities, we computed best linear unbiased predictors (BLUP), and ranked customers based on these BLUP estimates as detailed in Supplementary materials (S3).
Diagnostics in the mixed model were based on BLUPs and Studentized marginal residuals, using plots of residuals versus predicted values and Q–Q plots, and identifying the highest and lowest residual values. Square-root transformation of the weekly mortality claims ensured that model assumptions of normality were met.