Question

The Cardiovascular Risk in Young Finns Study showed average baseline triglyceride levels among 920 people of 0.926 mmol/L associated with a total sum of squared deviations of approximately 160 mmol/L. If a linear regression analysis of baseline triglyceride levels on physical activity levels had an R-squared of 0.30, what are the sum of squared deviations explained by the regression model?

a. 112 mmol/L
b. Not enough information
c. 48 mmol/L

Answer 1

The sum of the squared deviations explained by the regression model is:

c. 48 mmol/L

Explanation:

Average baseline triglyceride levels among 920 people = 0.926 mmol/L

Total sum of squared deviations, approximately = 160 mmol/L

Linear regression analysis of baseline triglyceride levels on physical activity levels had an R-squared = 0.30

Therefore, the sum of the squared deviations explained by the regression model = 160 * 0.30 = 48 mmol/L