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Table 1 Summary of statistical analysis of 'jackknife procedure' used to determine environmental importance of ecological parameters (re-printed with permission from [2]).

From: A method for statistically comparing spatial distribution maps

N-1 Excluded Parameter Difference from Comprehensive Map
  Mean Std Dev t Value Pr > |t| % Kappa
Aspect 0.227 1.1201 75.25 < .0001 14.90913 0.8471
Diurnal Temp Range -0.162 1.462 -41.09 < .0001 16.00786 0.8074
Elevation -0.266 1.265 -78.19 < .0001 14.59951 0.8366
Flow Accumulation -0.014 0.9739 -5.36 < .0001 12.44882 0.8683
Flow Direction -0.362* 1.0288 -130.6* < .0001 11.30027 0.818
Frost Days -0.005 1.0807 -1.62 0.1063§ 13.99543 0.8562
Land Cover 0.3947* 1.1047 132.67* < .0001 15.73201 0.8418
Precipitation -1.484* 2.1541* -255.8* < .0001 26.04734* 0.6299±
Minimum Temp 0.2259 1.0138 82.75 < .0001 13.24499 0.8606
Mean Temp -0.204 1.1033 -68.74 < .0001 13.09959 0.8392
Maximum Temp -0.298 1.4251 -77.65 < .0001 13.2078 0.8063
Topographic Index -0.026 0.957 -9.94 < .0001 12.70847 0.8627
Wet Days -0.134 1.2503 -39.82 < .0001 14.66416 0.833
  1. (*) Indicates extreme values of mean difference, standard deviation, t value, and % difference. (§ Indicates the p-value for which exclusion of this parameter from the model caused no significant difference. (±) Indicates the kappa value for which exclusion caused overall model agreement to drop below significance, indicating the model loses internal accuracy without inclusion of this parameter.