Question

17 Which independent variable explains the most amount of variance in Total Cholesterol (mg/dL)? At a different clinic, patients were recruited to analyze the effects of various variables in A. Age in years at screening explaining Total Cholesterol (mg/d L). Some of the variables included in this study are Age in years at screening, Weight (kg), Gender, Triglyceride (mg/dL), Direct HDL-Cholesterol CB. Weight (kg) C. Gender (mg/dL), Fasting Glucose (mg/d L), and Systolic Blood Pressure (1st reading). A multiple D. Triglyceride (mg/dL) regression was conducted to determine the extent to which Total Cholesterol (mq/dL) can E. Direct HDL-Cholesterol (mg/dL) be explained by these variables. Here is the output obtained when a multiple regression analysis was performed, with all of the variables entered simultaneously: F. Fasting Glucose (mg/dL) CG. Systolic Blood Pressure (1st reading) Model Summary Adjusted R Square Std. Error of the Estimate 18 R R Square Model How did you determine the answer to question 17 above? Please specify what 346 1 120 .083 36.643 value you used and what it was compared to for you to arrive at your conclusion a. Predictors: (Constant), Systolic: Blood pres (1st rdg) mm Hg, Age in years at screening. Triglyceride (mg/dL, Direct HDL-Cholesterol (mg/dLD, Gender, Fasting Glucose (mg/dD), Weight (kg Which of the following independent variable is/are not statistically significant? Select all that apply ANOVA Sum of Squares A. Model df Mean Square F Sig Age in years at screening 7 30907.959 003 1 Regression 4415.423 3.288 Residual 226923.679 169 1342.744 Total 257831.638 176 В. a. Dependent Variable: Total Cholesterol mg/dL Weight (kg) b. Predictors: (Constant), Systolic: Blood pres (1st rdg) mm Hg. Age in years at screening. Triglyceride (mg/dL), Direct HDL-Cholesterol (mg/dL), Gender, Fasting Glucose (mg/dL), Weight (kg) C. Gender Coefficients Standardized Coefficients Unstandardized Coefficients D. B Std. Error Beta t Model Sig. Triglyceride (mg/dL) 1 (Constant) 189.498 30.740 6.165 .000 Age in years at screening 509 152 245 3.355 001 Weight (kg) 138 117 .091 1.180 240 Е. Gender 4.973 5.660 .065 879 381 Direct HDL-Cholesterol (mg/dL) Triglyceride (mg/dL) -.010 021 -035 -458 .647 1.796 Direct HDL-Cholesterol (mg/dL) 380 211 132 .074 -119 Fasting Glucose (mg/dL) Systolic: Blood pres (1st rdg) mm Hg -.229 145 -1.575 117 F. Fasting Glucose (mg/dL) 059 -342 180 -.148 -1.898 a. Dependent Variable: Total Cholesterol( mg/dL) G. Systolic Blood Pressure (1st reading)

Answer 1

Solution:

Which independent variable explains the most amount of variance in Total Cholesterol (mo/dL? A. Age in years at screening Coefficients Standardized Coefficients B. Weight (kg) Unstandardized Coefficients C. Gender Std. Error в Beta Sig Model D. Triglyceride (mg/dL) 6.165 g00 Constant 189.498 30.740 CE. Direct HDL-Cholesterol (mg/dL) 3.355 Age in years at screening 509 152 245 001 CF. Fasting Glucose (mg/dL) Weight (kg) 240 138 117 091 1.180 G. Systolic Blood Pressure (1st reading) Gender 5.660 4.973 065 879 381 18 Triglyceride (mg/dL) 647 -010 021 -035 458 How did you determine the answer to question 17 above? Please specify what value you used and what it was compared to for you to arrive at your conclusion We used the value of standardized coefficients Beta. We looked for the largest absolute value among the standardized coefficients beta Which of the following independent variable is/are not statistically significant? Select all that apply Direct HDL-Cholesterol (mg/dL) 1.796 380 .211 132 .074 Fasting Glucose (mg/dL -229 145 -119 -1.575 .117 -1.898 Systolic: Blood pres (1st rdgà mm Hg -.342 180 -148 .059 a. Dependent Variable: Total Cholesteroli mg/d A. Age in years at screening В. Weight (kg) с. Gender D. Triglyceride (mg/dL) Е. Mark this only if the significance level is 0.05 Direct HDL-Cholesterol (mq/dL) F. Fasting Glucose (mg/dL) G. Systolic Blood Pressure (1st reading) Mark this only if the significance level is 0.05