# x12.txt # # Reference: # # Helmut Spaeth, # Mathematical Algorithms for Linear Regression, # Academic Press, 1991, # ISBN 0-12-656460-4. # # R J Freund and P D Minton, # Regression Methods, # Dekker, 1979, page 70. # # Discussion: # # Data from various public electricity supply authorities was collected. # # There are 16 rows of data. The data include: # # I, the index; # A0, 1; # A1, the capital costs, # A2, the labor costs, # A3, the energy costs. # B, the output of electricity in millions of kilowatts; # # We seek a model of the form: # # B = A0 * X0 + A1 * X1 + A2 * X2 + A3 * X3. # 6 columns 16 rows Index One Capital Costs Labor Costs Energy Costs Electrical Output (millions of Kilowatts) 1 1 98.288 0.386 13.219 1.270 2 1 255.068 1.179 49.145 4.597 3 1 208.904 0.532 18.005 1.985 4 1 528.864 1.836 75.639 9.897 5 1 307.419 1.136 52.234 5.907 6 1 138.283 1.085 9.027 1.832 7 1 418.883 2.390 41.676 4.865 8 1 247.439 1.356 31.244 2.728 9 1 19.478 0.115 1.739 0.125 10 1 537.540 2.591 104.584 9.685 11 1 605.507 2.789 82.296 8.727 12 1 174.765 0.933 21.990 2,239 13 1 946.766 4.004 125.351 10.077 14 1 296.490 1.513 43.232 4.477 15 1 645.690 2.540 75.581 7.037 16 1 288.975 1.416 42.037 3.507