# The NY Dairy Herd Improvement Cooperative in Upstate New York (NYDHIC) collects and analyzes data on milk production. One question of interest here is how to develop a suitable model to predict current milk production from a set of measured variables.
# The response variable (current milk production in pounds) and the predictor variables are given in Table below (Data Variable Definitions). Samples are taken once a month during milking. The period that a cow gives milk is called lactation. Number of lactations is the number of times a cow has calved or given milk.
# The recommended management practice is to have the cow produce milk for about 305 days and then allow a 60-day rest period before beginning the next lactation.
# The data set, consisting of 199 observations, was compiled from the NYDHI milk production records.
The Milk Production data can be found on the following Web site:
Data Variable Definitions
|Current||Current month milk production in pounds|
|Previous||Previous month milk production in pounds|
|Fat||Percent of fat in milk|
|Protein||Percent of protein in milk|
|Days||Number of days since present lactation|
|Lactation||Number of lactations|
|I79||Indicator variable (0 if Days < 79 and 1 if Days > 79)|