Factspan Interview Question | Regression Coefficients
Question
Your linear regression didn’t run and communicates that there is an infinite number of best estimates for the regression coefficients. What could be wrong?
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Answer ( 1 )
Regression coefficients are estimates of the unknown population parameters and describe the relationship between a predictor variable and the response
An infinite best estimate can occur If some of the explanatory variables are perfectly correlated (positively or negatively) then the coefficients would not be unique.
The coefficients are not really meaningful but can be used for prediction. Maybe it would be better, though, to eliminate some variables.