number of observations : 900
observation : households
country : California
A dataframe containing :
heating system, one of gc (gas central), gr (gas room), ec (electric central), er (electric room), hp (heat pump)
installation cost for heating system z (defined for the 5 heating systems)
annual operating cost for heating system z (defined for the 5 heating systems)
annual income of the household
age of the household head
numbers of rooms in the house
Kenneth Train's home page : http://elsa.berkeley.edu/~train/.
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