#statstab #527 t is for Trouble (and Textbooks): A Critique of Some Examples of the Paired-Samples t-test

Thoughts: Some issues seem to reappear in the field. We need better training.

#ttest #design #methods #error #analysis #repeatedmeasures
#outliers

https://www.jstor.org/stable/pdf/2987888.pdf?casa_token=cJM8NiLV_ygAAAAA:yWSbczJx4y1-PwhXptS3vh7mwzPzJ_VnUoF7w_v8yvKcY6kJku29daCauTL6V6tywgHdAPI8rAZqCLXgBsh873fRUXM8jjpbjRqN0AX-t8I3e-rXMQ

#statstab #519 Sensitivity Analysis and Robustness Checks

Thoughts: Multiverse analysis allows you to capture decision uncertainty.

#multiverse #jackknife #bias #robustness #sensitivity #r #outliers

https://mike-data-analysis.share.connect.posit.cloud/sensitivity-analysis-and-robustness-checks.html

#statstab #516 Is there a boxplot variant for Poisson distributed data?

Thoughts: People like their canned visualisations, but you need to think what question you are answering.

#poisson #boxplot #sqrttransform #dataviz #r #outliers #distribution

https://stats.stackexchange.com/questions/13086/is-there-a-boxplot-variant-for-poisson-distributed-data

#statstab #385 Understanding and Implementing Robust Regression in R

Thoughts: Not a thorough guide, but shows how simple it is to use a robust regression (rlm vs lm).

#R #regression #robust #statistics #guide #tutorial #outliers #Mestimator

https://www.spsanderson.com/steveondata/posts/2023-11-28/index.html

'Outlier Robust and Sparse Estimation of Linear Regression Coefficients', by Takeyuki Sasai, Hironori Fujisawa.

http://jmlr.org/papers/v26/23-1583.html

#outlier #outliers #robust

A quotation from Nassim Nicholas Taleb

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 #cumulativeerror #error #events #outlandishness #outliers #prediction #surprise

#Day7 of #30DayChartChallenge, theme: #Outliers

📦📉 Comparativa Boxplot: Rentabilidades log diarias de IBEX 35, S&P 500, Nasdaq (~3 años).

Nasdaq destaca por mayor volatilidad (IQR ~1.64% vs ~1.1%) y outlier máximo (+7.1% el 10-Nov-2022). Todos muestran "colas anchas".

Data: Yahoo Finance via #rstats {quantmod}. Viz: #ggplot2

📂 Código: https://t.ly/JxcM1

#dataviz #finance #StockMarket #Volatility #quant #IBEX35 #SP500 #Nasdaq

We the people species now classified
by the autonomous bots
as a rough approximation
of the standard median deviation
duly notated in the analytic bible
we are required to pray from

So our inevitable dissolution
will be an impersonal data execution
of a cold blooded algorithm
installed to maximize program efficiencies

Once we skewed variances have been classified
and human imperfections properly identified
a massive data dump will be launched
on all infected servers
to flush undesirable #outliers
replete with defective deficiencies
out of the now purified system

#vss365 #poetry #poem #amwriting