What is multicollinearity in the context of linear regression?

Practice Questions

Q1
What is multicollinearity in the context of linear regression?
  1. When the dependent variable is not normally distributed
  2. When independent variables are highly correlated with each other
  3. When the model has too many predictors
  4. When the residuals are not independent

Questions & Step-by-Step Solutions

What is multicollinearity in the context of linear regression?
  • Step 1: Understand that in linear regression, we try to predict a dependent variable using independent variables.
  • Step 2: Recognize that independent variables are the factors we use to make predictions.
  • Step 3: Learn that multicollinearity happens when two or more independent variables are very similar or related to each other.
  • Step 4: Realize that when independent variables are highly correlated, it can make it hard to know which variable is really affecting the dependent variable.
  • Step 5: Understand that this can lead to unstable estimates of the coefficients, meaning our predictions might not be reliable.
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