Statistical Analysis

Model 1: Fire Spreading Potential with 3-year-prior Mountain Pine Beetle Infestation as a Predictive Variable

The GLM Procedure

Dependent Variable: SizeHA

Source DF Sum of Squares Mean Square F Value Pr > F
Model 9 422.9978563 46.9997618 26.61 <.0001
Error 155 273.7724656 1.7662740    
Corrected Total 164 696.7703219      

 

R-Square Coeff Var Root MSE SizeHA Mean
0.607084 47.74389 1.329012 2.783628

 

Source DF Type III SS Mean Square F Value Pr > F
EASTING 1 44.4672451 44.4672451 25.18 <.0001
sqrtEasting 1 52.7388668 52.7388668 29.86 <.0001
SOUTHING 1 105.6822587 105.6822587 59.83 <.0001
sqrtSouthing 1 124.8646083 124.8646083 70.69 <.0001
IBM_2007 1 17.2721928 17.2721928 9.78 0.0021
SLOPE 1 19.3962967 19.3962967 10.98 0.0011
PPT_sm 1 8.9468396 8.9468396 5.07 0.0258
Tave_sp 1 9.9448637 9.9448637 5.63 0.0189
Tmin_sp 1 14.2468223 14.2468223 8.07 0.0051
Parameter Estimate Standard Error t Value Pr > |t|
Intercept -3.65134066 1.49000450 -2.45 0.0154
EASTING -9.34766982 1.86299756 -5.02 <.0001
sqrtEasting 7.86375958 1.43910958 5.46 <.0001
SOUTHING -13.25953401 1.71417933 -7.74 <.0001
sqrtSouthing 11.46772119 1.36391241 8.41 <.0001
IBM_2007 0.00842460 0.00269404 3.13 0.0021
SLOPE 0.04633359 0.01398188 3.31 0.0011
PPT_sm -0.00489876 0.00217661 -2.25 0.0258
Tave_sp 0.49588887 0.20898445 2.37 0.0189
Tmin_sp -0.65333597 0.23004172 -2.84 0.0051

model1 model1b

 

 

 

 

Model 2: Fire Spreading Potential without Mountain Pine Beetle Infestation as Predictive Variable

The GLM Procedure

Dependent Variable: SizeHA

Source DF Sum of Squares Mean Square F Value Pr > F
Model 7 388.4324746 55.4903535 28.25 <.0001
Error 157 308.3378473 1.9639353    
Corrected Total 164 696.7703219      

 

R-Square Coeff Var Root MSE SizeHA Mean
0.557476 50.34453 1.401405 2.783628

 

Source DF Type III SS Mean Square F Value Pr > F
EASTING 1 54.9456856 54.9456856 27.98 <.0001
sqrtEasting 1 66.2640091 66.2640091 33.74 <.0001
SOUTHING 1 107.9368153 107.9368153 54.96 <.0001
sqrtSouthing 1 127.6374948 127.6374948 64.99 <.0001
SLOPE 1 18.1921823 18.1921823 9.26 0.0027
Tave_sp 1 12.1845318 12.1845318 6.20 0.0138
Tmin_sp 1 12.6640162 12.6640162 6.45 0.0121

 

Parameter Estimate Standard Error t Value Pr > |t|
Intercept -3.92951509 1.55293406 -2.53 0.0124
EASTING -10.31452654 1.95005155 -5.29 <.0001
sqrtEasting 8.73133750 1.50316105 5.81 <.0001
SOUTHING -13.39768504 1.80720973 -7.41 <.0001
sqrtSouthing 11.58550996 1.43710868 8.06 <.0001
SLOPE 0.04378938 0.01438765 3.04 0.0027
Tave_sp 0.54572363 0.21909473 2.49 0.0138
Tmin_sp -0.61157995 0.24084138 -2.54 0.0121

model2 model2b

 

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