Table 2.

Statistics coefficients for Gothenburg Landvetter airport.

PI	Factor	$R^2$	Pearson’s r	Spearman’s $\rho$
Time Flown Level	TIF	0.13	0.37	0.3
Time Flown Level	WIF	0.93	0.97	0.99
Additional Distance	TIF	0.86	0.92	0.92
Additional Distance	WIF	0.18	0.42	0.38
Additional Fuel	TIF	0.07	0.26	0.3
Additional Fuel	WIF	0.46	0.68	0.82