An observational study is conducted to investigate the association between age and total serum cholesterol. The correlation is estimated at r = 0.35. The study involves n=125 participants and the mean (std dev) age is 44.3 (10.0) years with a range of 35 to 55 years, and mean (std dev) total cholesterol is 202.8 (38.4). The regression equation is below.
Determine the total serum cholesterol for a 50-year old person. Total sum cholesterol= Y=143.4=1.134x