SRC Forum - Message Replies

Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

Original Message:

Posted by: Wayne
Date posted: Mon Sep 29 4:49:39 US/Eastern 2003
Subject: Calculation of R-Squared for Duane Model
Message:
May i know how do we calculate or what is the formula for determining this R-Squared value in linear Duane Model? The R-Squared is a measure of how good the fit is.The larger the Value of R, the better it is.

Reply:

Subject: R Squared
Reply Posted by: Joe Dzekevich (jdzekevich@ieee.org )
Date Posted: Tue Nov 11 16:28:49 US/Eastern 2003
Message:
R-squared should be just a regression analysis fit. R-sq of 0 is no fit. R-sq of 1 is a perfect fit. R-sq then can be defined in a few ways: sum(Yhat - Yaver)^2 / sum(Y - Yaver)^2 or in ANOVA terms: SSR / SST or 1 - (SSE / SST) Take a look at some linear regression and/or ANOVA references. Joe