Does correlation equal causation? Does the strength of correlation depend on the direction? What is the meaning of a zero correlation? Explain your answers.
What is the difference between an independent and a dependent variable? Does a regression model imply causation? Why or why not?
What are the requirements that must be met for a regression analysis? What happens if these requirements are violated?
What is multi-collinearity and how does it affects the multi-regression model?
What are the linear relationship between two variables, both the coefficient of determination and the sample correlation coefficient?