A medical researcher is interested in assessing the probability of some symptoms of coronary heart disease (CHD) being present at a given age.For this reason he uses the following data collected on 100 individuals. 
Thus,the variable under study is CHD that assumes a value of 1 if coronary heart disease is present,and a value of 0 otherwise.Using Excel and Minitab,the following linear and logistics regression equations have been estimated: Linear Regression: 
= - 0.53796 + 0.02181Age
Logistic Regression: 
Using the linear equation,find the age of a person for which the estimated chances of having coronary heart disease are 50%?
Definitions:
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