Data examining the factors that impact the amount of hydrocarbon vapour released
when gasoline is pumped into a tank.

A data frame with 125 rows and 5 variables:

- tanktemp
initial tank temperature (degrees F)

- gastemp
temperature of the dispensed gasoline (degrees F)

- tankpres
initial vapour pressure in the tank (psi)

- gaspres
vapour pressure of the dispensed gasoline (psi)

- y
hydrocarbons emitted (g)

## References

Bedrick, E.J. (2000). Checking for lack of fit in linear models with parametric
variance functions. Technometrics 42 (3), 226–236.

Weisberg, S. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.