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?

Which tests do you like the most? The (Z) test, the (t) test, ANOVA, or the Chi Square. Please explain.