Covariance Matrix, Regression Analysis, Standard Error, Confidence Interval, Hands On Tutorials.
1] size column vector of regression model coefficients β_1, β_2, β_3 corresponding to the intercept, the Engine_Size and Curb_Weight. X is a [n x 3] size matrix containing the values of the regression variables. The first column of this matrix is a column of 1s and it acts as the placeholder for