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: An observational study is conducted to investigate the association between age and total serum cholesterol. The...

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Basic Math

: An observational study is conducted toinvestigate the association between age and total serumcholesterol. The correlation is estimated at r = 0.35. Thestudy involves n=125 participants and the mean (std dev) age is44.3 (10.0) years with an age range of 35 to 55 years, and mean(std dev) total cholesterol is 202.8 (38.4).

a. Estimate the equation of the line that bestdescribes the association between age (as the independent variable)and total serum cholesterol.

b. Estimate the total serum cholesterol for a50-year old person.

c. Estimate the total serum cholesterol for a70-year old person.

d. For part c, why or why not might thisestimate be appropriate?

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