2. Y=β0+β1•X1+β2•X2 +β3•X3 +εis a multiple linear regression model with Y being the response variable, βk the k-th regression coefficient, andXk the k-th predictor. Please answer the following questions (25 分):
申論題內容
e. When the above multiple linear regression model is fitted to a dataset, one of the outputs is multiple-R2. What does multiple-R2 explain? What is the equation for calculating multiple-R2?(5分)