A major health care organization conducted a study relating the risk of heart at
ID: 2909728 • Letter: A
Question
A major health care organization conducted a study relating the risk of heart attack to a patient's age, blood pressure, and HDL cholesterol. They have hypothesized the following relationship:
Y = ?0 + ?1X1 + ?2X2 + ?3X3
where Y is heart attack risk, Xl is patient's age, X2 is blood pressure, and X3is HDL level. Data are collected and a regression relationship is determined through the use of the computer. The following Excel output is obtained:
Regression Statistics ANOVA df SS MS F Significance F
Multiple R .828 Regression 3 3201.82 1067.27 11.66 .0003
R Square .686 Residual (Error) 16 1464.98 91.56
Standard Error 9.57 Total 19 4666.80
Observations 20
Coefficients Standard Error t-Stat P-Value
Intercept -101.92 - - -
X1 1.1400 0.2554 4.463 .0004
X2 0.3521 0.0744 4.367 .0005
X3 -0.0935 0.3108 - 0.301 .7674
The value of the regression coefficient for HDL Level is
-101.92
1.1400
0.3521
-0.0935
A.-101.92
B.1.1400
C.0.3521
D.-0.0935
Explanation / Answer
The variable X3 represents the HDL level.
From the regression table. we can get the value of regression coefficient for HDL level is -0.0935
Answer: Option D) -0.0935
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