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8. The systolic blood pressure of individuals is thought to be related to both age and weight. Let the systolic blood pressure, age, and weight be represented by the variables x1, x2, and x3, respectively. Suppose that Minitab was used to generate the following descriptive statistics, correlations, and regression analysis for a random sample of 15 individuals. Descriptive Statistics Variable ' N ' Mean ' Median ' TrMean ' StDev ' SE Mean l X1 ' 15 ' 158 42 ' 158 72 ' 158.42 ' 3127 ' 0807388 I X2 ' 15 ' 65.95 ' 66.45 ' 65.95 ' 1.091 ' 0281695 I X3 ' 15 ' 187.23 ' 186.63 ' 187.23 ' 4.171 ' 1076948 I Variable ' Minimum ' Maximum ' Q1 ' Q3 l X1 ' 124 ' 174 ' 135.828 ' 166.400 l X2 ' 41 ' 80 ' 47.088 ' 77.579 l X3 ' 124 ' 244 ' 142.885 ' 223,525 I Correlations (Pearson) | .. ix. | X2 ' 0.829 ' l X3 ' 0.860 ' 0.661 I Regression AnalysisThe regression equation isx1 - 0.837 + 1 .120x2 + 0. 928x3 Predictor ' Coef ' StDev ' T ' P Constant ' 0837 ' 0737 ' 1.14 ' 0.139 lxz ' 1120 ' 0.589 ' 1.90 ' 0.041 IX3 ' 0928 ' 0716 ' 1.30 ' 0110 IS = 0.221 ' R sq= 90. 3 % ' R sqladj): 95.1 % ' ' Given the correlation coefficient for all pairs, which pair shows the strongest influence? Points Possible: 1.000 I\"? I1 and 12 I\"? 1'1 and 1'3 I\") 12 and I3