Downer data (Data file: Downer) For unknown reasons, dairy cows sometimes become recumbent—they lay down. Called downers, these cows may have a serious illness that may lead to their death. These data...

Downer data (Data file: Downer) For unknown reasons, dairy cows sometimes become recumbent—they lay down. Called downers, these cows may have a serious illness that may lead to their death. These data are from a study of blood samples of over 400 downer cows studied at the Ruakura New Zealand Animal Health Laboratory during 1983– 1984. A variety of blood tests were performed, and for many of the animals, the outcome (survived, died) was determined. The goal is to see if survival can be predicted from the blood measurements. The variables in the data file are described in Table 12.7. These data were collected from veterinary records, and not all variables were recorded for all cows.