Author: Todd, C. G.; Millman, S. T.; McKnight, D. R.; Duffield, T. F.; Leslie, K. E.
Title: Nonsteroidal anti-inflammatory drug therapy for neonatal calf diarrhea complex: Effects on calf performance Document date: 2010_6_23
ID: 326huu05_22
Snippet: Once the final multivariable models were constructed, the assumptions of homoscedasticity and normality of residuals were evaluated and model diagnostics were performed. Plots of residuals, leverage, and DFFITS were examined to identify outliers, high leverage points, and influential observations. The fit of each mixed model was evaluated and the appropriate correlation structure was determined by identifying that which yielded the smallest Akaik.....
Document: Once the final multivariable models were constructed, the assumptions of homoscedasticity and normality of residuals were evaluated and model diagnostics were performed. Plots of residuals, leverage, and DFFITS were examined to identify outliers, high leverage points, and influential observations. The fit of each mixed model was evaluated and the appropriate correlation structure was determined by identifying that which yielded the smallest Akaike information criterion. For survival analyses, log cumulative hazard plots were visually inspected to verify the assumption of proportional hazards. In addition, sensitivity analysis was used to evaluate the assumption of independent censoring.
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