You find the F-test under the heading “Equality of Variances” in your SAS output. In our case, the p-value (Pr > F) is 0.03, which is less than 0.05; we cannot assume σ12 = σ22 . We need to use the “t Value” from the “Unpooled” Method. Conclusion The t* value ...
Tutorial in Biostatistics Multivariable Prognostic Models :在生物统计中的多变量预测模型教程97阅读 文档大小:91.0K 36页 wutuhuao上传于2014-12-28 格式:PPT Regression Methods in Biostatistics Linear, Logistic, Survival, and Repeated Measures Models (Statistics for Biology and Health)-[Eric Vittinghoff, ...