When gasoline is pumped into a tank, hydrocarbon vapors are forced out and into the atmosphere. To reduce this significant source of air pollution, devices are installed to capture the vapor. In testing these vapor recovery systems, a "sniffer" measures the amount recovered. John Rice provided the data for the file sniffer.txt.
This data frame contains the following columns:
Initial tank temperature (degrees F)
Temperature of the dispensed gasoline (degrees F)
Initial vapor pressure in the tank (psi)
Vapor pressure of the dispensed gasoline (psi)
Hydrocarbons emitted (grams)
Weisberg, S. (2005). Applied Linear Regression, 3rd edition. New York: Wiley, Section 8.3.2.