The data set insulate is one person's record of weekly gas
consumption (gas) and outside temperature (temp), before (insulation=0)
and after (insulation=1) insulating a house. The house thermostat was
set at 20 degrees Celsius during the 26 weeks before and 30 weeks after
insulating.
A data frame with 56 observations on the following 3 variables.
: before insulation (0) or after (1)
: outside temperature (in degrees Celsius)
: gas consumption (in 1000 cubic feet)