Exactly! The first step is to plot a scatter diagram. Also, on a dataset as small as this, there is no real positive assurance that parametric assumptions hold, and the correlation is particularly sensitive to distributional assumptions. So I suggest a non-parametric correlation rather than a parametric one anyway. With the proviso that this could well be exactly 1, without this finding being anything to get excited about.
Robert Newcombe.
-----Original Message-----
From: A UK-based worldwide e-mail broadcast system mailing list [mailto:[log in to unmask]] On Behalf Of John Bibby
Sent: 24 July 2018 21:28
To: [log in to unmask]
Subject: Re: correlation coefficient
Please look at the data, not the summary statistics. JOHN BIBBY
On Tue, 24 Jul 2018 at 20:01, Martin Bland < [log in to unmask]> wrote:
> You are correct, the value of the correlation coefficient which would
> be significant with 4 observations is 0.95.
>
> Martin
>
> On 24 July 2018 at 17:57, paaveen jeyaganth <[log in to unmask]> wrote:
>
> > Dear allstat ,
> > i have 4 data point i did a pearson correlation end up with r=
> > 0.8919 p= 0.1081 why is that it's not significant since it's high
> > correlation 0.89 because of sample size??
> >
> > Thanks
> > Paaveen
> >
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>
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