The data from data217.dat contains information on 78seventh-grade students. We want to know how well each of IQ scoreand self-concept score predicts GPA using least-squares regression.We also want to know which of these explanatory variables predictsGPA better. Give numerical measures that answer these questions.(Round your answers to three decimal places.)
(Regressor: IQ) R 2 ANSWER 1
(Regressor: Self-Concept) R 2 : ANSWER 2
Which variable is the better predictor?
IQSelf Concept Answer 3
obs gpa iq gender concept1 7.94 118 2 662 8.292 104 2 603 4.643 83 2 474 7.47 120 2 555 8.882 90 1 676 7.585 104 2 597 7.65 104 2 758 2.412 107 2 589 6 114 1 5510 8.833 107 2 10111 7.47 116 1 5912 5.528 91 1 7313 7.167 120 2 3814 7.571 114 1 5715 4.7 117 1 3516 8.167 114 1 5817 7.822 123 1 5318 7.598 132 1 5619 4 90 2 4920 6.231 111 1 6821 7.643 125 2 9222 1.76 74 2 3524 6.419 118 1 4826 9.648 123 2 7427 10.7 118 1 10328 10.58 112 2 6729 9.429 103 2 6430 8 123 2 8231 9.585 125 2 5932 9.571 121 1 5033 8.998 117 1 6034 8.333 122 1 7035 8.175 108 2 6336 8 111 2 7737 9.333 118 1 5538 9.5 125 2 6139 9.167 127 2 4540 10.14 129 1 8341 9.999 140 1 4643 10.76 126 2 7444 9.763 124 2 5645 9.41 127 2 5146 9.167 122 2 6947 9.348 107 2 7148 8.167 124 2 8450 3.647 97 2 4351 3.408 125 1 2252 3.936 88 2 2553 7.167 118 2 7054 7.647 123 2 5055 .53 80 2 3756 6.173 95 2 6457 7.295 105 2 5758 7.295 99 1 5859 8.938 124 1 8060 7.882 103 1 5061 8.353 101 2 3662 5.062 92 2 6963 8.175 117 2 7564 8.235 118 2 6765 7.588 114 2 3968 7.647 113 2 4369 5.237 109 1 5371 7.825 97 2 6172 7.333 99 1 6174 9.167 129 2 7076 7.996 120 2 6377 8.714 103 1 4578 7.833 111 1 4179 4.885 108 2 6780 7.998 98 1 6583 3.82 102 2 5684 5.936 101 1 4885 9 118 1 3786 9.5 115 1 5087 6.057 108 2 3288 6.057 105 1 6389 6.938 107 2 49
