Trending Stocks 📈Chaos Edge: Spark Innovation - Reed Hastings and Patrick
penninehttp://financemetrics.scienceontheweb.net Maximising the value of a portfolio. Calculating #Variance, #CoVariance and portfolio Variance using the magic of Matrix Algebra. Calculations feature 5 ftse stocks, BP, Vodafone, UU.L, Tesco and Morrison. Detailed exposition leads one through x transpose multiplied b x. #MatrixAlgebra
Hacker NewsWeighting an Average to Minimize Variance
https://www.johndcook.com/blog/2025/11/12/minimum-variance/
#HackerNews #Weighting #Average #Variance #Minimization #Statistics #DataScience
Dr Mircea Zloteanu ❄️☃️🎄#statstab #393 Statistically Efficient Ways to Quantify Added Predictive Value of New Measurements [actual post]
Thoughts: #392 has the comments, but this is where the magic happens.
#modelselection #modelcomparison #variance #effectsize #tutorial
Statistically Efficient Ways to Quantify Added Predictive Value of New Measurements – Statistical Thinking
Researchers have used contorted, inefficient, and arbitrary analyses to demonstrated added value in biomarkers, genes, and new lab measurements. Traditional statistical measures have always been up to the task, and are more powerful and more flexible. It’s time to revisit them, and to add a few slight twists to make them more helpful.
C.In case anyone's keeping score, the idea that JFETs have hugely variable properties and that this problem cannot be - or at least has not been - fixed with different design or manufacturing practices, this batch showed it pretty clearly to me.
20 J113s, minus 1 fake, equals 19 devices. I measured the Vgs / pinch-off voltage and the Id / drain current in my test rig. The result?
6 very distinct bins with between 2 and 6 devices in each. Vgs overall varied from (-) 1.30 V to 2.11 V (variance is 38% of the larger value, or 62% of the smaller...), and Id from 5.7 mA to 12.8 mA, a spread of 125% (!) of the smaller value.
No wonder so many JFET circuits just don't work if you don't hand-match the devices.
#variance #variability #characteristics #measure #measurement #match #JFET #tolerance
WIST Quotations Has Moved!A quotation from Nassim Nicholas Taleb
Don’t cross a river if it is four feet deep on average.Nassim Nicholas Taleb (b. 1960) Lebanese-American essayist, statistician, risk analyst, aphorist
The Black Swan, Part 2, ch. 10 “The Scandal of Prediction” (2007)
Sourcing, notes: wist.info/taleb-nassim-nichola…
#quote #quotes #quotation #qotd #blackswan #assumptions #average #danger #expectations #mean #variability #variance
bsmall2🧵
> ... de Moivre's equation in action. The variation of the mean is inversely proportional to the sample size, so small counties display much greater variation than large counties. A county with, say, 100 inhabitants that has no cancer deaths would be in the lowest category. But if it has 1 cancer death it would be among the highest. Counties like Los Angeles, Cook or Miami-Dade with millions of inhabitants do not bounce around like that.
@bsmall2
#StatisticsClass #Variance #EstimatingMeans
> ... de Moivre's equation in action. The variation of the mean is inversely proportional to the sample size, so small counties display much greater variation than large counties. A county with, say, 100 inhabitants that has no cancer deaths would be in the lowest category. But if it has 1 cancer death it would be among the highest. Counties like Los Angeles, Cook or Miami-Dade with millions of inhabitants do not bounce around like that.
@bsmall2
#StatisticsClass #Variance #EstimatingMeans
Radiocittafujiko - Rss BotPlay list Puntata n. 11 di Domenica 16 Marzo 2025 https://www.radiocittafujiko.it/play-list-puntata-n-11-di-domenica-16-marzo-2025/ #DenieleDeGregori #ClathrusArcheri #CristianMarchi #DeniseOrlandi #EmilyRinaldi #Meganoidi #PLAYLIST #Gabriele #gazzelle #Santeria #Variance #Ascanio #freccia #Gustavo #MUSICA #T-Pam #Aua
Play list Puntata n. 11 di Domenica 16 Marzo 2025 - Radio Città Fujiko
Easy Pop, 100% Musica Indipendente per menti libere ✔Prima parte ♬1 • Meganoidi - i set di hollywood2 • Ascanio - milano brindisi3 • Denise Orlandi - déjà vu4 • Clathrus Archeri - b low5 • Santeria - niente di vero6 • Gabriele - stanza nove7 • T-Pam - lost…
Mild success can be explainable by skills and labor. Wild success is attributable to variance.
Nassim Nicholas Taleb (b. 1960) Lebanese-American essayist, statistician, risk analyst, aphorist.
Fooled by Randomness, Part 1, ch. 1 (2001)
Sourcing, notes: wist.info/taleb-nassim-nichola…
#quote #quotes #quotation #odds #chance #average #goodluck #hardwork #labor #luck #skill #success #variance
Justin Buzzard