[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: p value for spearman's correlation

From: Alan Mead
Subject: Re: p value for spearman's correlation
Date: Sat, 26 Dec 2020 13:57:24 -0600
User-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0


My understanding was that Spearman's Rho is simply Pearson's r calculated on ranked data. If so, you can interpret them identically (other than the effect of ranking, which may be substantial), including using the same hypothesis test.

Isn't it a bug if there is a space for p-value and it's blank?

If you're saying that PSPP censors the p-value for small samples, that seems like the main use-case for using p-values. I just checked and the introductory stats book I taught from (Howell's undergraduate "Fundamental Statistics for the Behavioral Sciences") only has a couple pages on Spearman's Rho, but confirms the above and doesn't say anything about the hypothesis test being "wildly inaccurate" for small samples? I mean, all estimates from small samples are "wildly inaccurate," right?


On 12/26/2020 6:22 AM, John Darrington wrote:
It N is large the significance of Spearman's Rho can be estimated using the
T statistic.   This is what SPSS does in its NPAR TEST CORR command.  However
it is wildly inaccurate for small values of N and SPSS has taken a lot of
criticism for it.


On Sat, Dec 26, 2020 at 12:45:26PM +0530, Ramagokula Krishnan wrote:
     Hope you are safe and well. First of all, thanks for making this software a
     reality. Many of my students in India are benefiting from this.
     This is a small query I have with regard to Spearman's Rank Correlation
     using ordinal variables. There is an option to perform the test under the
     crosstab option which is great. However, the p value (significance) is not
     shown in the output.
     I've attached a screenshot of the output. Please have a look at the bottom
     most table which has the correlation values but the significance has not
     been mentioned.
     It would be great if there was a workaround through which I could estimate
     the p value as well.
     Thank you in advance
     Dr. S. Rama Gokula Krishnan


Alan D. Mead, Ph.D.
President, Talent Algorithms Inc.

science + technology = better workers

The irony of this ... is that the Internet is
both almost-infinitely expandable, while at the
same time constrained within its own pre-defined
box. And if that makes no sense to you, just
reflect on the existence of Facebook. We have
the vastness of the internet and yet billions
of people decided to spend most of them time
within a horribly designed, fake-news emporium
of a website that sucks every possible piece of
personal information out of you so it can sell it
to others. And they see nothing wrong with that.

-- Kieren McCarthy, commenting on why we are not 
                    all using IPv6

reply via email to

[Prev in Thread] Current Thread [Next in Thread]