1. The plot shown below is the residual against the fitted value (?̂) to check the...

1.
The plot shown below is the residual against the fitted value (?̂) to check the constant variance assumption error term ?.

a) Does the above plot support the assumptions about error term ?? Please explain the reason for your answer.
b) Give two different approaches to correct when the constant variance assumption is violated.

c) Definetheterminteractioningenerallinearmodel.

2.

Define the term multicollinearity in multiple linear regression.
How to detect multicollinearity by considering the pairwise correlation among the

independent variables.
What difficulty caused by multicollinearity

Expert Solution

orchestra answered 1 year ago

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