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Table 4 The results of comparisons between observed and randomized re-burn patch size distributions for each of the three study areas. The distributions of all observed and randomized re-burn patches greater than 40 ha in size were tested using the Mann-Whitney U test statistic and the Kolmogorov-Smirnov Independent Samples Test (both using α = 0.05). Only the Frank Church Wilderness Area showed a difference between the observed and randomized re-burn patch size distributions (indicated by bolded significance values).

From: Characterizing Fire-on-Fire Interactions in Three Large Wilderness Areas

  Bob Marshall Selway-Bitterroot Frank Church
Number of re-burn cases (n) 1 847 1 337 12 412
Mean re-burn patch size (ha) 1 067.2 365.4 1 115.2
Median re-burn patch size (ha) 388.4 224.9 382.4
Maximum re-burn patch size (ha) 20 259 5 091 50 602
Standard deviation 1 805.6 453.0 2 437.6
Mann-Whitney U 20 948 13 628 1 118 051
Significance (P) 0.057 0.080 0.000
Kolmogorov-Smirnov significance (P) 0.270 0.082 0.000