John, 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? -Alan 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. > > J' > > On Sat, Dec 26, 2020 at 12:45:26PM +0530, Ramagokula Krishnan wrote: > Hi, > > 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 http://www.alanmead.org 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
