In exercise physiology, an objective measure of aerobic

Chapter 12, Problem 12.66

(choose chapter or problem)

In exercise physiology, an objective measure of aerobic tness is the oxygen consumption in volume per unit body weight per unit time. Thirty-one individuals were used in an experiment in order to be able to model oxygen consumption against age in years (x1), weight in kilograms (x2), time to run 11 2 miles (x3), resting pulse rate (x4), pulse rate at the end of run (x5), and maximum pulse rate during run (x6). (a) Do a stepwise regression with input signicance level 0.25. Quote the nal model. (b) Do all possible subsets using s2, Cp, R2, and R2adj. Make a decision and quote the nal model.ID yx 1 x2 x3 x4 x5 x6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 44.609 45.313 54.297 59.571 49.874 44.811 45.681 49.091 39.442 60.055 50.541 37.388 44.754 47.273 51.855 49.156 40.836 46.672 46.774 50.388 39.407 46.080 45.441 54.625 45.118 39.203 45.790 50.545 48.673 47.920 47.467 44 40 44 42 38 47 40 43 44 38 44 45 45 47 54 49 51 51 48 49 57 54 52 50 51 54 51 57 49 48 52 89.47 75.07 85.84 68.15 89.02 77.45 75.98 81.19 81.42 81.87 73.03 87.66 66.45 79.15 83.12 81.42 69.63 77.91 91.63 73.37 73.37 79.38 76.32 70.87 67.25 91.63 73.71 59.08 76.32 61.24 82.78 11.37 10.07 8.65 8.17 9.22 11.63 11.95 10.85 13.08 8.63 10.13 14.03 11.12 10.60 10.33 8.95 10.95 10.00 10.25 10.08 12.63 11.17 9.63 8.92 11.08 12.88 10.47 9.93 9.40 11.50 10.50 62 62 45 40 55 58 70 64 63 48 45 56 51 47 50 44 57 48 48 76 58 62 48 48 48 44 59 49 56 52 53 178 185 156 166 178 176 176 162 174 170 168 186 176 162 166 180 168 162 162 168 174 156 164 146 172 168 186 148 186 170 170 182 185 168 172 180 176 180 170 176 186 168 192 176 164 170 185 172 168 164 168 176 165 166 155 172 172 188 155 188 176 172