0 econometrics questions: 1. What is the difference between a population and a sample in econometrics? 2. How do you define heteroscedasticity in econometrics and how can it be addressed? 3. What are the assumptions of linear regression in econometrics, and why are they important? 4. What is the difference between correlation and causation in econometrics? 5. In multiple regression analysis, what is the purpose of the Adjusted R-Squared? 6. What is the Durbin-Watson statistic in econometrics, and what does it measure? 7. How do you test for autocorrelation in econometrics, and why is it important to address it in regression analysis? 8. What is the purpose of instrumental variables in econometrics, and how are they used in practice? 9. What is a time series analysis in econometrics, and what specific models are used in practice? 10. How do you assess the goodness of fit of a regression model in econometrics, and what are some common metrics used for this?