Type of Document Master's Thesis Author Gatz, Philip L. URN etd-11152013-040304 Title A comparison of three prediction based methods of choosing the ridge regression parameter k Degree Master of Science Department Statistics Advisory Committee
Advisor Name Title Raymond H. Myers Committee Chair Gary J. Ulrich Committee Member Marion R. Reynolds Committee Member Robert S. Schulman Committee Member Keywords
- Prediction theory
Date of Defense 1985-07-02 Availability restricted Abstract
A solution to the regression model y = xβ+𝓔 is usually obtained using ordinary least squares. However, when the condition of multicollinearity exists among the regressor variables, then many qualities of this solution deteriorate. The qualities include the variances, the length, the stability, and the prediction capabilities of the solution.
An analysis called ridge regression introduced a solution to combat this deterioration (Hoerl and Kennard, 1970a). The method uses a solution biased by a parameter k. Many methods have been developed to determine an optimal value of k. This study chose to investigate three little used methods of determining k: the PRESS statistic, Mallows' Ck statistic, and DF—trace. The study compared the prediction capabilities of the three methods using data that contained various levels of both collinearity and leverage. This was completed by using a Monte Carlo experiment.This was completed by using a Monte Carlo experiment.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access LD5655.V855_1985.G479.pdf 1.86 Mb 00:08:36 00:04:25 00:03:52 00:01:56 00:00:09next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.
If you have questions or technical problems, please Contact DLA.