```Date: Fri, 4 Nov 2005 08:12:51 -0500 Reply-To: Hari Nath Sender: "SAS(r) Discussion" From: Hari Nath Subject: Re: Stderror, Error Stdev, Residual error ???/ Are they same Comments: To: Paul Swank Paul R. Swank, Thanks for your explanation. The standard error and residual error are fine but the term "error standard deviation" is quite confusing. I was really interpreting that as the difference between the total standard deviation minus the differences in main effects. Will check with that. thanks again hari On Thu, 3 Nov 2005 14:47:54 -0600, Swank, Paul R wrote: >The residual error is the difference between the model proedicted Y and >the actual value of Y. The error standard deviation is the root mean >square error which is a function of the residual errors, the sum of >squared residuals divided by the degrees of freedom for the error term. >The standard error is the standard deviation of a sample statistic such >as the mean of the regression coefficient. The standard error depends on >the residual standard deviation. In regression, for example, the >standard error of a regression coefficient is a function of the ratio of >the sums of squares for the predictor and the sum of squared errors. > > >Paul R. Swank, Ph.D. >Professor, Developmental Pediatrics >Director of Research, Center for Improving the Readiness of Children for >Learning and Education (C.I.R.C.L.E.) >Medical School >UT Health Science Center at Houston > >-----Original Message----- >From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of >Hari Nath >Sent: Thursday, November 03, 2005 2:12 PM >To: SAS-L@LISTSERV.UGA.EDU >Subject: Re: Stderror, Error Stdev, Residual error ???/ Are they same > >On Thu, 3 Nov 2005 08:32:34 -0500, Hari Nath >wrote: > >>Hi all, >> Are the terms residual error, Standard error and error standard >>deviation are the same?? If yes, then all the 3 terms describes the >>variablility that remains after all the main effects and/or interaction > >>effects have been segregated. If not/ those terms are different, then >>does the error standard deviation mean the difference of(total standard > >>deviation & differences in main effects and/or interaction effects)?? >> >>Can somebody make this point clear to me!! >> >>Thanks in advance, >> >>hari ```

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