-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, 28 Sep 2022 05:48:34 -0700 (PDT) Paul Dunphy <[email protected]> wrote:
> The rule of thumb is 20 years of data to look for climate signals. Yes, well.... 20 samples is a rule of thumb I was taught in statistics class: You can't talk about confidence in any summary figures such as the mean (average) unless you have at least 20 samples. It's surprising how often percentages are reported in the Media with two places of accuracy on studies done with fewer than 20 samples. The opinion that follows *is not* WeeWX related. I have hesitated about posting it more than once though because I have no credentials that entitle me to such an opinion, but I have decided *not to* refrain further in this space at this time and go ahead and blurt out my feelings about seeing climate trends. I applaud the programming effort that examines trend in WeeWX data for evidence of climate change. I, too, have looked at local temperature variability. My work is with regard to cumulative growing-degree-day models of insect development (yet another topic on which I have no credentials to speak). Here is my attempt to forestall a climate-change interpretation of my figures. I am posting because I feel that readers of this thread — whether they are moved or not — need to hear some political skepticism that goes a little beyond statistical skepticism. In particular, the original poster's concerns over station siting are my concerns, too. o https://lacusveris.com/Phenology/models.shtml#Fig.%20H - -- .. Be Seeing You, .. Chuck Rhode, Sheboygan, WI, USA .. Weather: http://LacusVeris.com/WX .. 60° — Wind WNW 8 mph — Sky overcast. Light rain; mist. -----BEGIN PGP SIGNATURE----- iF0EARECAB0WIQT+MY/5I/LMPSswTbVg2/xipKOWUgUCYz8NrQAKCRBg2/xipKOW UjnZAJ9dszRC42dBNOOQKjozpqv29BNWLQCfZZdfFQd9uhkMuwHIQwv33WfHIRw= =vaFk -----END PGP SIGNATURE----- -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/20221006121733.758db19a%40wealthy.
