The SAS System 1 13:24 Monday, March 24, 1997 Forward Selection Procedure for Dependent Variable NITEXC Step 1 Variable NITIN Entered R-square = 0.95152988 C(p) = 0.19478831 DF Sum of Squares Mean Square F Prob>F Regression 1 176039.65105472 176039.65105472 451.52 0.0001 Error 23 8967.30894528 389.88299762 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 101.08658320 7.35602243 73626.68406474 188.84 0.0001 NITIN 0.64694573 0.03044597 176039.65105472 451.52 0.0001 Bounds on condition number: 1, 1 -------------------------------------------------------------------------------- Step 2 Variable WETIN Entered R-square = 0.95383292 C(p) = 1.18772819 DF Sum of Squares Mean Square F Prob>F Regression 2 176465.72840308 88232.86420154 227.27 0.0001 Error 22 8541.23159692 388.23779986 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 88.74785286 13.87826796 15876.06942341 40.89 0.0001 WETIN 0.02934402 0.02801072 426.07734836 1.10 0.3062 NITIN 0.63199810 0.03356537 137640.57608325 354.53 0.0001 Bounds on condition number: 1.220562, 4.882248 -------------------------------------------------------------------------------- No other variable met the 0.5000 significance level for entry into the model. Summary of Forward Selection Procedure for Dependent Variable NITEXC Variable Number Partial Model Step Entered In R**2 R**2 C(p) F Prob>F 1 NITIN 1 0.9515 0.9515 0.1948 451.5192 0.0001 2 WETIN 2 0.0023 0.9538 1.1877 1.0975 0.3062 The SAS System 2 13:24 Monday, March 24, 1997 Backward Elimination Procedure for Dependent Variable NITEXC Step 0 All Variables Entered R-square = 0.95426223 C(p) = 5.00000000 DF Sum of Squares Mean Square F Prob>F Regression 4 176545.15437710 44136.28859428 104.32 0.0001 Error 20 8461.80562290 423.09028114 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 111.02503203 92.09694447 614.87158016 1.45 0.2421 WEIGHT -0.00594399 0.02807714 18.96195525 0.04 0.8345 DRYIN -0.06000511 0.24052534 26.33224358 0.06 0.8055 WETIN 0.04783734 0.09083460 117.34499123 0.28 0.6042 NITIN 0.64809282 0.06471880 42427.40669891 100.28 0.0001 Bounds on condition number: 18.81062, 144.3604 -------------------------------------------------------------------------------- Step 1 Variable WEIGHT Removed R-square = 0.95415974 C(p) = 3.04481775 DF Sum of Squares Mean Square F Prob>F Regression 3 176526.19242186 58842.06414062 145.70 0.0001 Error 21 8480.76757814 403.84607515 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 91.84916426 16.26623043 12876.34024832 31.88 0.0001 DRYIN -0.08200363 0.21193002 60.46401878 0.15 0.7027 WETIN 0.05721277 0.07748286 220.18641282 0.55 0.4684 NITIN 0.65159457 0.06112979 45884.38908641 113.62 0.0001 Bounds on condition number: 15.29972, 84.5105 -------------------------------------------------------------------------------- Step 2 Variable DRYIN Removed R-square = 0.95383292 C(p) = 1.18772819 DF Sum of Squares Mean Square F Prob>F Regression 2 176465.72840308 88232.86420154 227.27 0.0001 Error 22 8541.23159692 388.23779986 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 88.74785286 13.87826796 15876.06942341 40.89 0.0001 WETIN 0.02934402 0.02801072 426.07734836 1.10 0.3062 NITIN 0.63199810 0.03356537 137640.57608325 354.53 0.0001 Bounds on condition number: 1.220562, 4.882248 The SAS System 3 13:24 Monday, March 24, 1997 -------------------------------------------------------------------------------- Step 3 Variable WETIN Removed R-square = 0.95152988 C(p) = 0.19478831 DF Sum of Squares Mean Square F Prob>F Regression 1 176039.65105472 176039.65105472 451.52 0.0001 Error 23 8967.30894528 389.88299762 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 101.08658320 7.35602243 73626.68406474 188.84 0.0001 NITIN 0.64694573 0.03044597 176039.65105472 451.52 0.0001 Bounds on condition number: 1, 1 -------------------------------------------------------------------------------- All variables left in the model are significant at the 0.1000 level. Summary of Backward Elimination Procedure for Dependent Variable NITEXC Variable Number Partial Model Step Removed In R**2 R**2 C(p) F Prob>F 1 WEIGHT 3 0.0001 0.9542 3.0448 0.0448 0.8345 2 DRYIN 2 0.0003 0.9538 1.1877 0.1497 0.7027 3 WETIN 1 0.0023 0.9515 0.1948 1.0975 0.3062 The SAS System 4 13:24 Monday, March 24, 1997 Stepwise Procedure for Dependent Variable NITEXC Step 1 Variable NITIN Entered R-square = 0.95152988 C(p) = 0.19478831 DF Sum of Squares Mean Square F Prob>F Regression 1 176039.65105472 176039.65105472 451.52 0.0001 Error 23 8967.30894528 389.88299762 Total 24 185006.96000000 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 101.08658320 7.35602243 73626.68406474 188.84 0.0001 NITIN 0.64694573 0.03044597 176039.65105472 451.52 0.0001 Bounds on condition number: 1, 1 -------------------------------------------------------------------------------- All variables left in the model are significant at the 0.1500 level. No other variable met the 0.1500 significance level for entry into the model. Summary of Stepwise Procedure for Dependent Variable NITEXC Variable Number Partial Model Step Entered Removed In R**2 R**2 C(p) F Prob>F 1 NITIN 1 0.9515 0.9515 0.1948 451.5192 0.0001 The SAS System 5 13:24 Monday, March 24, 1997 N = 25 Regression Models for Dependent Variable: NITEXC C(p) R-square Variables in Model In 0.19479 0.95152988 1 NITIN 1.18773 0.95383292 2 WETIN NITIN 1.56524 0.95296959 2 DRYIN NITIN 1.82386 0.95237815 2 WEIGHT NITIN 3.04482 0.95415974 3 DRYIN WETIN NITIN 3.06224 0.95411990 3 WEIGHT WETIN NITIN 3.27735 0.95362796 3 WEIGHT DRYIN NITIN 5.00000 0.95426223 4 WEIGHT DRYIN WETIN NITIN 103.27980 0.72493353 3 WEIGHT DRYIN WETIN 109.49540 0.70614534 2 DRYIN WETIN 183.76950 0.53171499 1 DRYIN 183.96969 0.53583097 2 WEIGHT DRYIN 314.82815 0.23657226 2 WEIGHT WETIN 324.50973 0.20985779 1 WETIN 414.13333 0.00489861 1 WEIGHT -------------------------------------- The SAS System 6 13:24 Monday, March 24, 1997 N = 25 Regression Models for Dependent Variable: NITEXC Adjusted R-square Variables in Model R-square In 0.94963591 0.95383292 2 WETIN NITIN 0.94942249 0.95152988 1 NITIN 0.94869409 0.95296959 2 DRYIN NITIN 0.94804889 0.95237815 2 WEIGHT NITIN 0.94761113 0.95415974 3 DRYIN WETIN NITIN 0.94756560 0.95411990 3 WEIGHT WETIN NITIN 0.94700338 0.95362796 3 WEIGHT DRYIN NITIN 0.94511468 0.95426223 4 WEIGHT DRYIN WETIN NITIN 0.68563831 0.72493353 3 WEIGHT DRYIN WETIN 0.67943128 0.70614534 2 DRYIN WETIN 0.51135477 0.53171499 1 DRYIN 0.49363378 0.53583097 2 WEIGHT DRYIN 0.17550378 0.20985779 1 WETIN 0.16716974 0.23657226 2 WEIGHT WETIN -.03836666 0.00489861 1 WEIGHT --------------------------------------