the issues involved are not dissimilar, to the ones discussed in this,
which was circulated this morning
https://www.nature.com/articles/d41586-019-00857-9
On Thu, 21 Mar 2019 at 10:05, COX, NICHOLAS J. <[log in to unmask]> wrote:
>
> Many disciplines talk about validity (~ accuracy) and reliability (~ precision), which are also good words here.
>
> -----Original Message-----
> From: A UK-based worldwide e-mail broadcast system mailing list <[log in to unmask]> On Behalf Of John Whittington
> Sent: 20 March 2019 23:35
> To: [log in to unmask]
> Subject: Re: Precision and accuracy
>
> At 22:39 20/03/2019, Wilson, Paul wrote:
> >My understanding is that "accurate" means that the mean iof a
> >theoretically ininte number of estimates equals the true value, whereas
> >precise means that all estimates are close to each other. I always give
> >the analogy of throwing darts at a dartboard, with the intention of
> >hitting the bullseye. If one person's darts land uniformly distributed
> >around the double ring, that is "accurate" as "on average" they are in
> >the bullseye. If they all land in the triple 20 that is precise.
>
> Indeed, my understanding is the same ... or, to put it another way, translated into usual statistical language (and talking of quantification, not simply "accurate" and "precise), "accuracy" = bias and "precision" = variability.
>
> Kind Regards,
>
>
> John
>
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