I know that robust regression can downweight outliers. Should someone
apply robust regression when the data have skewed distributions but do not
have outliers? Regression assumptions require normality of residuals, but
not the normality of raw scores. So does it help at all to use robust
regressi
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On 27 Feb 2002 14:14:44 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote:
> At 04:11 PM 2/27/02 -0500, Rich Ulrich wrote:
>
> >Categorizing the values into a few categories labeled,
> >"none, almost none, " is one way to convert your scores.
> >If those labels do make sense.
> well, if 750
In article <[EMAIL PROTECTED]>,
Glen <[EMAIL PROTECTED]> wrote:
>"Chia C Chong" <[EMAIL PROTECTED]> wrote in message
>news:...
>> Hi!
>> I have a set of random numbers and if I know their expectation/mean, would
>> it be possible to deduce a PDF to describe the distribution of them?
>Knowing t
At 09:51 AM 2/28/02 -0800, Jay Tanzman wrote:
>I partially did this, insofar as I ran Pearson and Spearman correlations
>between
>several of the scales and, not surprisingly, the two correlation coefficients
>and their p-values were similar. < that issue is entirely a separate
>one since t
> "Simon, Steve, PhD" wrote:
>
> Jay Tanzman got chewed out by his boss for averaging a 7 point ordinal scale.
> Generally it is not a good idea to argue with your boss, but perhaps you might
> ask what was the grade point average that he or she received in college. When
> you hear the response
I'm trying to find a good introduction to REML (restricted maximum
likelihood). I'm a biologist rather than a statistician. If you have any
suggestions I'd great appreciate hearing them. Thanks.
--
Dr Jonathan Newman
St. Peter's College, New Inn Hall Street, Oxfo
At 07:37 AM 2/28/02 -0800, Brad Anderson wrote:
>I think a lot of folks just run standard analyses or arbitrarily apply
>some "normalizing" transformation because that's whats done in their
>field. Then report the results without really examining the
>underlying distributions. I'm curious how f
Rich Ulrich <[EMAIL PROTECTED]> wrote in message
news:<[EMAIL PROTECTED]>...
> On 27 Feb 2002 11:59:53 -0800, [EMAIL PROTECTED] (Brad Anderson)
> wrote:
>
> > I have a continuous response variable that ranges from 0 to 750. I
> > only have 90 observations and 26 are at the lower limit of 0, whi
Title: RE: Means of semantic differential scales
Jay Tanzman got chewed out by his boss for averaging a 7 point ordinal scale. Generally it is not a good idea to argue with your boss, but perhaps you might ask what was the grade point average that he or she received in college. When you hear t
On 27 Feb 2002 15:01:24 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote:
>At 01:39 PM 2/27/02 -0600, Jay Warner wrote:
>
>> > >
>> > >Not stressful 1__ 2__ 3__ 4__ 5__ 6__ 7__ Very stressful
>
>just out of curiosity ... how many consider the above to be an example of a
>bipolar scale?
>
>i don't
DMR, I should have read your previous posting more carefully. I have now had
coffee.
>Not stressful 1__ 2__ 3__ 4__ 5__ 6__ 7__ Very stressful
is a question that has an extent response format. The cognitive schema the
response format tries to invoke might be reinforced by anchoring with zero f
I would consider it a unipolar extent scale. Maybe the visual anchor should be
0 to 6 to aid association with the number line concept.
Dennis Roberts wrote:
> At 01:39 PM 2/27/02 -0600, Jay Warner wrote:
>
> > > >
> > > >Not stressful 1__ 2__ 3__ 4__ 5__ 6__ 7__ Very stressful
>
> just out of c
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