Re: can multicollinearity force a correlation?

Hi Rich, okay i'll post the reason why I ask: It is because I am validating a 24hr dietary recall questionnaire using a food frequency questionnaire: as someone else pointed out i got an error, also a perfect correlation for pearsons. it is much more complicated than this but that is the scoo

Re: can multicollinearity force a correlation?

On 5 Feb 2002 18:01:15 -0800, [EMAIL PROTECTED] (Wuzzy) wrote: > > You made a model with the "exact same exposure in different units", > > which is something that no one would do, > > Hehe, translation is don't post messages until you've thought them > through. > > Anyway, turns out that the a

*Job Posting* Statistician - SPC - San Jose, CA

Description: Successful global organization creating some of the world's leading products that support key communications businesses, dedicated to providing a broad portfolio of high-performance solutions at the most competitive cost. Seeking an experienced statistician to take a key role to promo

Re: can multicollinearity force a correlation?

In article <[EMAIL PROTECTED]>, Wuzzy <[EMAIL PROTECTED]> wrote: >Is it possible that multicollinearity can force a correlation that >does not exist? >I have a very large sample of n=5,000 >and have found that >disease= exposure + exposure + exposure + exposure R^2=0.45 >where all 4 exposures a

Re: 'Distance' between two normal distributions

In article , Francis Dermot Sweeney <[EMAIL PROTECTED]> wrote: >If I have two normal distributions N(m1, s1) and N(m2, s2), what is a >good measure of the distance between them? I was thinking of something >like a K-S distance like max|phi1-phi2|. I know it probably

ANN: Books: Learning with Kernels

I thought readers of sci.stat.edu might be interested in these two books. For more information, please visit http://mitpress.mit.edu/0262194759/ and http://mitpress.mit.edu/0262194759/026208306X Thank you! Best, Jud Learning with Kernels Support Vector Machines, Regularization, Optimization, an

Re: EViews 3.1 error message

On 6 Feb 2002 11:31:10 -0800, [EMAIL PROTECTED] (James McQueen) wrote: > Hi, > > I tried to run a workfile on EViews 3.1 that I had created in EViews > 4.0. It is a three equation system estimated via full information > maximum likelihood. It worked fine in 4.0. Now, I'm using 3.1 and it > opens

Re: Case-cross over

On Thu, 7 Feb 2002 13:20:44 +0100, "Anna Axmon" <[EMAIL PROTECTED]> wrote: > Hi, > > does anyone know if there is a textbook on case-cross over design? > "case crossover design" (in quotes) gets 258 hits reported in google. I did not notice a textbook review, but those should lead you to wh

Re: time series analysis

- I don't see a public answer to this one from a couple of weeks ago - On 25 Jan 2002 10:16:45 -0800, [EMAIL PROTECTED] (Jack Eslick) wrote: > I am working with a data that were collected at non-uniform time > intervals. I want to use regression analyses to determine if there is > a temporal

Re: Sensitivity Analysis

JJ Diamond <[EMAIL PROTECTED]> wrote: : sensitivity analysis is not the same as sensitivity and specificity : from epidemiology. these latter terms are used when describing the : characteristics of a diagnostic test and they ultimately relate to the : utility of a test for diagnosis. my memory s

Case-cross over

This is a multi-part message in MIME format. --=_NextPart_000_0008_01C1AFDA.3FBF0860 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, does anyone know if there is a textbook on case-cross over design? /Anna --=_NextPart_000_0008_0

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