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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 _um_-- _----- _-- \"m- _- _-- Regression Analysis The regression equation is x] = 0.833 + 1.388x2 + 0.937JC3 Predictor Coef StDev P Constant 0.833 0.693 1.20 0.126 X2 1.388 0.665 2.09 0.029 X3 0.937 0.513 1.83 0.046 S = 0.320 R-sq = 91.7% R-sq(adj) = 93.7% Relative to its mean, which variable has the greatest spread of data values? O X2 O X3 O X1