Answer Happy

Multicollinearity: will occur if two predictor variables in a regression are highly correlated. O requires correction by adding additional variables to the model. leads to unreliable effect sizes and may inflate standard errors. the first two options above. the first and third options above. For the linear regression y = Bo + B1x1 + B2x2 + €, suppose that xi and x2 are highly correlated. Which of the following is true? ОО Interpretation of B1 and B2 is somewhat meaningless. Variables xi and x2 explain similar variation. Standardised versions of xi and x2 will not be correlated, and the model should be re-run using them. the first two options above. the first three options above. For simple regression, we model yi = Bo + B1Xi + εi for i = 1, ..., n. Which of the following assumptions are also made? The predictor variables have constant variance with mean 0. The residuals are independent. The residuals are normally distributed with mean 0. the second and third options above. the first three options above.