Carefully sketch a scatter plot of given data

Reference no: EM131436954

Medicine and Clinical Studies

Some physicians use the cholesterol ratio (CR = total cholesterol/HDL cholesterol) as a measure of a patient's risk of heart disease. In addition, the triglyceride concentration (TG) is associated with coronary artery disease in many patients. In a study of the relationship between these two variables, a random sample of adults was obtained, and the triglyceride level (x₁, mg/dL) and cholesterol ratio (y) was obtained for each person.

a. Carefully sketch a scatter plot of these data (y versus x₁). The relationship does not appear to be linear. Can you describe this relationship between y and x1?

b. Compute the natural logarithm of each difference (x₁ 2 129). That is, find the values of a new predictor variable, x2 = ln(x₁ - 129).

c. Carefully sketch a scatter plot of y versus the new predictor variable x₂. Describe this relationship.

d. Find the estimated regression line, and complete the ANOVA table using x₂ as the predictor variable.

Reference no: EM131436954

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