An interesting reflection -- a form of metamorphosis?
On Mon, 10 Jul 2000, Znarf Akfak wrote:
> I'm considering reporting
To whom, for what purpose(s) ? The "several bivariate associations"
part rather suggests that you'll want to be making comparisons,
implicitly if not explicitly; and even if you don't, your readers will.
What else will you report to give evidence of comparability?
(For example, are all the variables in question equivalently (in any
sense!) restricted in range?)
More to the point, what is it you want to compare _really_ ?
> Pearson's correlation coefficient with a confidence interval
> for several bivariate associations. As bivariate normality is assumed
> under the computation of the confidence interval, I have two questions.
>
> 1. What is a good way to examine the assumption of bivariate normality
> for a given data set?
In the absence of useful collateral information (sample size, for one),
eyeballing the scatterplot is probably as good a way as any.
> 2. To what extent are such confidence intervals robust to departures
> from bivariate normality?
Depends on (a) sample size, (b) the nature(s) of the departure(s) of
interest (shape & size of effect, at least).
> References to publications would be much appreciated as I don't have
> access to CIS, as would other suggestions and comments.
>
> Cheers,
>
> --
> Znarf
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
>
>
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