The software quality engineer decided to scre e independent variables to determine the best set for predi e regression sums of squares for some of possible regressi ere found to be as follows: Independent variables in model SSR 2970.64 3654.85 3584.54 X1, X2 5123.80 I1, L3 5409.79 12, 13 3741.30

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Machine Learning Problem

The software quality engineer decided to screen
(select) the independent variables to determine the best set for predict-
ing y. The regression sums of squares for some of possible regression
models were found to be as follows:
Independent variables in model SSR
2970.64
3654.85
3584.54
X1, X2
5123.80
X1, X3
5409.79
X2, 13
3741.30
X1, 12, x3
5409.89
X1, 12, 13, I4
5409.99
(a) For the R? criterion, indicate which set of independent variables
you would recommend as to best set for predicting y.
(b) An observer states: "There are only four variables, so why screen?
You might as well use all four." Discuss.
Transcribed Image Text:The software quality engineer decided to screen (select) the independent variables to determine the best set for predict- ing y. The regression sums of squares for some of possible regression models were found to be as follows: Independent variables in model SSR 2970.64 3654.85 3584.54 X1, X2 5123.80 X1, X3 5409.79 X2, 13 3741.30 X1, 12, x3 5409.89 X1, 12, 13, I4 5409.99 (a) For the R? criterion, indicate which set of independent variables you would recommend as to best set for predicting y. (b) An observer states: "There are only four variables, so why screen? You might as well use all four." Discuss.
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