Linear ridge regression coefficient's estimation and testing with different ridge related measures such as MSE, R-squared etc. REFERENCES i. Hoerl and Kennard (1970) <doi:10.2307/1267351> ii. Halawa and El-Bassiouni (2000) <doi:10.1080/00949650008812006> iii. Imdadullah, Aslam, and Saima (2017) iv. Marquardt (1970) <doi:10.2307/1267205>.
