Question 14
You are solving a regression problem with 8 explanatory variables. The data has 150 observations, and the R-square value was found to be 0.75. You are adding one more explanatory variable to the dataset (a total of 9 explanatory variables). The new R-square value is 0.8. Then answer the given subquestions.
What does the value of the new adjusted R-square value imply?
The new variable must be dropped from the model
The new variable must be kept in the model
The data is too small for fitting a regression model with 9 variables
None of these