Question
ID: A weight. 37. The systolic blood pressure of individuals is thought to be related to both age and weig 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 15 157.35 157.55 157.35 3.049 0.787248 15 72.71 73.01 72.71 1.636 0.422413 15 153.51 152.61 153.51 4.112 1.061714 Variable Minimum MaximumQ1 127 45 124 173 86 234 141.721 167.822 47.004 77.702 144.414 224.719 Correlations (Pearson) 0.817 0.864 0.602 Regression Analysis The regression equation is x, = 0.616 + 1.338 x2 +0.874 x3 Predictor Constant Coef 0.616 1.338 0.874 R-sge 94.4 % StDev 0.568 0.599 0.576 R-sq(adj) = 94.4 % 1.08 0.150 2.23 0.023 1.52 0.078 S = 0.457 | Compute the coefficient of variation for x3 A) 2.679 B) 0.874 C) 1.637 D) 4.112 E) 2.028
Explanation / Answer
Solution:
We have to find coeffient of variation (CV) for x3
Formula:
CV = [Stdev(X3) / mean(X3) ] * 100
mean(X3 = 153.51
Stdev(X3) = 4.112
CV = 2.679
Option (A) is correct
Done