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## Re: p value for spearman's correlation

**From**: |
John Darrington |

**Subject**: |
Re: p value for spearman's correlation |

**Date**: |
Sun, 27 Dec 2020 12:22:49 +0100 |

**User-agent**: |
Mutt/1.10.1 (2018-07-13) |

On Sat, Dec 26, 2020 at 07:58:40PM -0600, Alan Mead wrote:
This paper, https://arxiv.org/pdf/2008.01200.pdf, suggests that the test
is flawed both in small samples and in samples with distinctly
non-normal underlying data. I don't know what it means to be "normally
distributed" for ranks... Ranks are always distributed uniformly unless
there are ties. Their method is implemented in the 'perk' library and is
also a sampling/resampling approach.
This is a criticism of fundamentals of the test itself, rather than
its implementation.
Alternatively, I wouldn't be upset if PSPP refuses to print any p-value
for N < 30. I think ideally we would add a keyword requesting a more
advanced algorithm.
I think this is probably the best course of action at least in the short
term.
Finally, I don't think any of this discussion bears on why the p-value
is missing from the Pearson r in CROSSTABS.
True. We need to look into that as well.
J'

**p value for spearman's correlation**, *Ramagokula Krishnan*, `2020/12/26`
**Re: p value for spearman's correlation**, *John Darrington*, `2020/12/26`
**Re: p value for spearman's correlation**, *Alan Mead*, `2020/12/26`
**Re: p value for spearman's correlation**, *Ben Pfaff*, `2020/12/26`
**Re: p value for spearman's correlation**, *Alan Mead*, `2020/12/26`
**Re: p value for spearman's correlation**, *John Darrington*, `2020/12/26`
**Re: p value for spearman's correlation**, *Alan Mead*, `2020/12/26`
**Re: p value for spearman's correlation**, *Alex Ernesto Davila Davila*, `2020/12/26`
**Re: p value for spearman's correlation**, *Alan Mead*, `2020/12/27`
**Re: p value for spearman's correlation**,
*John Darrington* **<=**
**Re: p value for spearman's correlation**, *Ben Pfaff*, `2020/12/27`
**Re: p value for spearman's correlation**, *Alan Mead*, `2020/12/27`
**Re: p value for spearman's correlation**, *Alex Ernesto Davila Davila*, `2020/12/27`