Characterizing persistent unburned islands within the Inland Northwest USA

Fire Ecology

Table 3 Two-sample Kolmogorov-Smirnov D statistic and P-values to test significance of difference between the and Fractal Dimension Index (FRAC) distributions among unburned islands within fires in the Inland Pacific Northwest from 1984 to 2014 based on their degree of persistence

Degree of persistence	Area		FRAC		Number of observations
Degree of persistence	D	P	D	P	Number of observations
1 vs. 2	0.357	<0.001	0.3533	<0.001	n₁ = 749 179 n₂ = 64 765
1 vs. 3	0.4927	<0.001	0.4857	<0.001	n₁ = 749 179 n₃ = 2 771
1 vs. 4	0.6129	<0.001	0.6023	<0.001	n₁ = 749 179 n₄ = 87
2 vs. 3	0.1357	<0.001	0.1324	<0.001	n₂ = 64 765 n₃ = 2 771
2 vs. 4	0.2559	<0.001	0.249	<0.001	n₂ = 64 765 n₄ = 87
3 vs. 4	0.1202^*	0.1748^*	0.1166^*	0.2018^*	n₃ = 2 771 n₄ = 87