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Re: st: which statistical analysis to use


From   David Hoaglin <dchoaglin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: which statistical analysis to use
Date   Thu, 19 Apr 2012 07:10:54 -0400

Dear Deborah,

It would do no violence to the data to reverse the order of the
nonzero scores.  It requires only a linear transformation: revscore =
8 - score if score > 0.

Your data, however, are not suitable for ANOVA (and, if they were, you
would use two-way ANOVA rather than one-way, and perhaps consider
companies as a random factor).  The correlation inherent in the
rankings is one problem, and the preponderance of zeros is another.

I wonder what sort of analysis the people who designed that question
had in mind.  It's a good idea to plan ahead.

David Hoaglin

On Thu, Apr 19, 2012 at 6:14 AM, Deborah Beckers
<deborahbeckers@hotmail.com> wrote:
> Dear David,
>
> Thank you for your help!
> I am definitely going to look up that paper and books, I'm certain it will be useful, thankyou!
> Just like you said I was also thinking about replacing all the chosen skills by '1', this will certainly make things easier I think..
> Too bad that '1' is the most important, otherwise I could maybe have use a oneway anova like in this example:
> http://nd.edu/~rwilliam/stats1/Oneway-Stata.pdf
>
> Anyway, I'm going to have a look at those references you gave me, and if that doesn't work out I'll probably make the data dichotomous.. Again, thank you very much for your help!
> Deborah

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