EXAMPLE OF A PARTIAL MULTIPLE REGRESSION ANALYSIS

# EXAMPLE OF A PARTIAL MULTIPLE REGRESSION ANALYSIS - EXAMPLE...

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/* EXAMPLE OF A PARTIAL MULTIPLE REGRESSION ANALYSIS DATASET: RESULT FROM AN EXPERIMENT TO STUDY TOTAL OXYGEN DEMAND IN DAIRY WASTE. SAMPLES WERE MEASURED OVER A 220 DAY PERIOD Y = TOTAL OXYGEN DEMAND X1 = BIOLOGICAL OXYGEN DEMAND X2 = TOTAL KJELDAHL NITROGEN X3 = TOTAL SOLIDS X4 = TOTAL VOLATILE SOLIDS X5 = CHEMICAL OXYGEN DEMAND I = DAY OF SAMPLING */ data demand; input day BOD TKN TS TVS COD lnTOD; daysq = day*day; cday = (day - 80.4 )/ 100 ; cdaysq = cday*cday; datalines ; 0 1.125 0.232 7.160 0.0859 8.905 1.3563 7 0.920 0.268 8.804 0.0865 7.388 0.8976 15 0.835 0.271 8.108 0.0852 5.348 0.7482 22 1.000 0.237 6.370 0.0838 8.056 0.7160 29 1.150 0.192 6.441 0.0821 6.960 0.3130 37 0.990 0.202 5.154 0.0792 5.690 0.3617 44 0.840 0.184 5.896 0.0812 6.932 0.1139 58 0.650 0.200 5.336 0.0806 5.400 0.1139 65 0.640 0.180 5.041 0.0784 3.177 -0.2218 72 0.583 0.165 5.012 0.0793 4.461 -0.1549 80 0.570 0.151 4.825 0.0787 3.901 0.0000 86 0.570 0.171 4.391 0.0780 5.002 0.0000 93 0.510 0.243 4.320 0.0723

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EXAMPLE OF A PARTIAL MULTIPLE REGRESSION ANALYSIS - EXAMPLE...

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