Question: The R-squared never decreases, not even when it's just a chance correlation between variables. A regression model that contains more independent variables than another model

The R-squared never decreases, not even when it's just a chance correlation between variables. A regression model that contains more independent variables than another model can look like it provides a better fit merely because it contains more variables.

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2. Ask questions, listen rather than attempt to persuade.

9. How much of the information collected will be used in decision-making?

1. Background knowledge of the subject and