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Just the residuals, but see Common Errors in Statistics (and How to Avoid Them) Wiley, 2003, for further caveats. Phillip Good ----- Original Message ----- From: Robert Fall <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, January 21, 2004 4:46 AM Subject: QUERY: Data assumptions for Linear Regression > Hello all, > > Does anyone know know if all the predictor and outcome variables should > be normally distributed for the assumptions to be met to carry out a > Multiple Linear Regression - or is it just the residuals that need to be > normally distributed? > > Thanks in advance, > Robert >