Sign in

Sai Krishna

@thechaoticneuron.bsky.social
86 followers 12 following 78 posts

I do statistics 📈, writing ✍️ and acting 🎭 - in no certain order Here to become wiser with every post. d-saikrishna.github.io

PostsRepliesMedia
Sai Krishna @thechaoticneuron.bsky.social · 28/04/2025
Air is a public good and in any society with common sense, it should be a top government priority to provide clean air. Alas, as we wait for that common sense to dawn on us, let's at least mask up in the meantime. #SkySky AirQuality
020
Sai Krishna @thechaoticneuron.bsky.social · 21/03/2025
LogProbs is a cool Prompt Engineering skill. 🤖📈 #Statsky #Stats #AI #LLM medium.com/@saikrishna_...
medium.com
LogProbs
LogProbs is one of the basic skills for a Prompt Engineer to have.
000
Sai Krishna @thechaoticneuron.bsky.social · 06/03/2025
One key insight about the impact of LLMs on creative writing from Andrej Karpathy’s LLM Deepdive: medium.com/@saikrishna_... #AI 🤖📈 #LLM #WritingCommunity
medium.com
Will an AI joke land?
One key insight about the impact of LLMs on creative writing from Andrej Karpathy’s LLM Deepdive
000
Sai Krishna @thechaoticneuron.bsky.social · 22/01/2025
When I write stories, I ensure that I have the climax first with all its payoffs 😁
000
Sai Krishna @thechaoticneuron.bsky.social · 15/01/2025
#Poetry #TinyPoem
000
Sai Krishna @thechaoticneuron.bsky.social · 15/01/2025
Survey of 416 residents. The polling group has a sampling error of 3% in their familiar territories. 95% Confidence Interval falls below 50%. Yet the audacity/ignorance to claim that entire Greenland supports to be adopted by the US. 🏛️ #rstats #PASky 🤖📈 #Stats
030
Sai Krishna @thechaoticneuron.bsky.social · 10/01/2025
𝐖𝐡𝐞𝐧 𝐬𝐡𝐨𝐮𝐥𝐝 𝐲𝐨𝐮 𝐛𝐫𝐮𝐬𝐡 𝐲𝐨𝐮𝐫 𝐭𝐞𝐞𝐭𝐡? 1. Brush twice a day — Morning and Night after dinner. 2. Morning, it’s better to 𝐛𝐫𝐮𝐬𝐡 𝐚𝐟𝐭𝐞𝐫 𝐛𝐫𝐞𝐚𝐤𝐟𝐚𝐬𝐭. If you find it scandalous, read this blog! medium.com/@saikrishna_... #rstats #Stats #StatSky 🤖📈
medium.com
When to brush your teeth? A good ANOVA study!
I found this paper which did a simple ANOVA study to find out when should one brush their teeth!
041
Sai Krishna @thechaoticneuron.bsky.social · 06/01/2025
Don’t wanna be the best #Poetry #TinyPoem
000
Sai Krishna @thechaoticneuron.bsky.social · 03/01/2025
Greed #Poetry #TinyPoem
010
Sai Krishna @thechaoticneuron.bsky.social · 02/01/2025
Trident of endeavour Science works, finds truths Business pays, fulfils desires Power lies, frauds morals #Poetry #TinyPoem #haiku
010
Sai Krishna @thechaoticneuron.bsky.social · 01/01/2025
Happy New Year! #Poetry #TinyPoem
000
Sai Krishna @thechaoticneuron.bsky.social · 31/12/2024
Farts of a city #Poetry #TinyPoem #AirQuality
000
Sai Krishna @thechaoticneuron.bsky.social · 30/12/2024
Trying my hand at writing poems 🌝 Thanks to Douglas Kearney’s course! www.coursera.org/learn/poetry... #Poetry #TinyPoem
030
Sai Krishna @thechaoticneuron.bsky.social · 23/12/2024
TL;DR Paper tried to compare air quality between land cover classes using Kruskal Wallis tests link.springer.com/article/10.1... But practical significance seems neglected for statistical significance. What do you say? #Stats #rstats 🤖📈 medium.com/@saikrishna_...
medium.com
Statistical issues in this paper studying relation between air quality and LULC
A paper got published in Environmental Monitoring and Assessment. It studied relation between land-use classes (Urban, Shrubland, Forest…
020
Sai Krishna @thechaoticneuron.bsky.social · 19/12/2024
Grove air quality sensor + ESP8266 reporting indoor air quality to a google sheet every 10 minutes #IoT github.com/d-saikrishna...
010
Sai Krishna @thechaoticneuron.bsky.social · 16/12/2024
🏛️ Interesting argument on lack of democratic accountability 🏛️ osf.io/preprints/os... 1. It’s not the lack of awareness. But political partisanship is an obstacle to accountability. 2. Lack of social capital. Public support to policies that preserve public goods reduces if there is personal cost
023
Reposted by Sai Krishna
Nabeel Siddiqui @nabsiddiqui.bsky.social · 13/12/2024
This is my yearly reminder that published results of coefficients using logistic regression in Python are likely wrong because they are L2 penalized by default: github.com/scikit-learn... #rstats #statistics #digitalhumanities
github.com
Suggestion: Add support for unpenalized logistic regression · Issue #6738 · scikit-learn/scikit-learn
LinearRegression provides unpenalized OLS, and SGDClassifier, which supports loss="log", also supports penalty="none". But if you want plain old unpenalized logistic regression, you have to fake it...
0114
Sai Krishna @thechaoticneuron.bsky.social · 13/12/2024
If I ask you to forecast pollution in Delhi on some random day, you'd say a number X If I further ask you to forecast on a Winter Day, you'd top up X with some y This is Bayes theorem running in your head. This blog attempts to quantify it medium.com/@saikrishna_... #rstats #stats 🤖📈
medium.com
Bayesian probabilistic forecasts using categorical information | Part 1
In this blog, I will make Bayesian forecasts of Ozone concentrations.
0100
Sai Krishna @thechaoticneuron.bsky.social · 12/12/2024
No answers :/ Anyways. Even without an uninformative prior, we provide a bounded prior in a Bernoulli trial. P(p) = 1 (when 0<=p<=1) P(p)=0 (otherwise) So the bayesian estimates are informed of this bounded nature of p. The MLE doesn’t consider that. Hence the difference. #rstats #stats 🤖📈
100
Sai Krishna @thechaoticneuron.bsky.social · 11/12/2024
Quiz time! Why is the Maximum Likelihood Estimate (MLE) of probability of success (p) in a Bernoulli trial not equal to the Bayesian Estimate? p_mle = r/n p_bayesian = (r+1)/(n+2) (Assuming uninformative prior) r = number of successes n = number of trials #rstats #stats 🤖📈
121
Sai Krishna @thechaoticneuron.bsky.social · 11/12/2024
So if x^2 is the confounder, adding x to the model may not completely remove the Omitted Variable Bias 😬😬😬 Seems obvious now. But wow, that’s an interesting thing! Makes causal inference more complex
021
Sai Krishna @thechaoticneuron.bsky.social · 09/12/2024
𝐖𝐡𝐚𝐭 𝐢𝐬 𝐢𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧? It impinges on a thinking mind and makes it change its opinion. How should this change be affected? 𝐁𝐀𝐘𝐄𝐒 𝐓𝐇𝐄𝐎𝐑𝐄𝐌. 𝐓𝐡𝐞 𝐥𝐢𝐤𝐞𝐥𝐢𝐡𝐨𝐨𝐝 𝐟𝐮𝐧𝐜𝐭𝐢𝐨𝐧 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐞𝐝 𝐛𝐲 𝐭𝐡𝐞 𝐝𝐚𝐭𝐚 𝐢𝐬 𝐭𝐡𝐞 𝐈𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧 - an extract from an autobiographical essay of statistician Debabrata Basu #stats #rstats 🤖📈
020
Sai Krishna @thechaoticneuron.bsky.social · 07/12/2024
Freshly published: Assessing Air Quality during India’s National Clean Air Programme (NCAP) www.sciencedirect.com/science/arti...
sciencedirect.com
Assessing Air Quality During India’s National Clean Air Programme (NCAP): 2019-2023
Did air quality improve during India’s National Clean Air Programme (NCAP)? Since its inception in 2019, 131 cities were designated as non-attainment …
022
Sai Krishna @thechaoticneuron.bsky.social · 05/12/2024
🏛️ A good read for policy folks 🏛️
000
Sai Krishna @thechaoticneuron.bsky.social · 04/12/2024
How can a causal variable become useless in prediction? 100% Mediation in Action! medium.com/@saikrishna_... #rstats #stats #Statistics 🤖📈
medium.com
100% Mediation in Action
I wrote about Mediators in the previous blog. This is a follow-up blog to it.
022
Sai Krishna @thechaoticneuron.bsky.social · 04/12/2024
Time to revise “Value of Science” essay by Richard Feynman calteches.library.caltech.edu/1575/1/Scien...
calteches.library.caltech.edu
000
Sai Krishna @thechaoticneuron.bsky.social · 02/12/2024
🏛️ Wonderful work 🏛️
021
Sai Krishna @thechaoticneuron.bsky.social · 02/12/2024
Cofounder causal diagram will become mediator causal diagram when we turn it. Both variables will be needed to get the unbiased effect of the Mediator. Mediator should be removed to get the unbiased effect of Confounder. #Stats is absurd at times :p #rstats 🤖📈 medium.com/@saikrishna_...
240
Sai Krishna @thechaoticneuron.bsky.social · 01/12/2024
Wrote a short story about a very important hobby :) dsaikrishna.substack.com/p/retire
dsaikrishna.substack.com
Retire
It has been a month since Padmakshi resigned.
000
Sai Krishna @thechaoticneuron.bsky.social · 30/11/2024
Visualize Collider Bias with me. Wrote this for myself. To get an intuitive understanding of Collider bias without any regression equations and lines. Hope it helps other learners as well! medium.com/@saikrishna_... #stats #rstats
medium.com
Visualize Collider Bias with me
It’s 2020. You are a doctor. COVID19 has just picked up. You are going to face a flood of patients today.
74611
Sai Krishna @thechaoticneuron.bsky.social · 30/11/2024
Work with air quality or climate data? Here are a few ways to visualize them. Python codes: github.com/urbanemissio... What other interesting visualisations can be made? #stats 🤖📈
162
Sai Krishna @thechaoticneuron.bsky.social · 28/11/2024
Quiz time. Why don't we use Generalized Least Squares (GLS) as the default linear regression method instead of making assumptions like equal variance, Independence of errors for the sake of OLS? #rstats #stats
210
Sai Krishna @thechaoticneuron.bsky.social · 27/11/2024
#Bsky is amazing! Even stackexchange couldn’t answer this for me. But, Bsky took this question to the right people. Thank you @pdalgd.bsky.social !
000
Sai Krishna @thechaoticneuron.bsky.social · 26/11/2024
Humans have been counting for at least 50,000 years. We counted to keep track of data such as group members size, property, or debts - using bones, tally marks, numbers, etc. A statistician continues this human enterprise of counting and counts well. #stats #rstats link.medium.com/WoGj8FBvQOb
link.medium.com
141
Sai Krishna @thechaoticneuron.bsky.social · 26/11/2024
A Nature journal’s brief on finding human inclination to tilt right while kissing reported a chi-square #stats of 5.34. But, when I calculated it, I got 10.45. Am I wrong? Or what’s wrong here? #rstats 🤖 stats.stackexchange.com/questions/65...
stats.stackexchange.com
Reason for discrepancy in calculated $\chi^2$ value in this right-side preference while kissing problem
In the article Adult persistence of head-turning asymmetry, the author observed $ 124 $ couples. $80 $ of them kiss by moving their head to the right. Remaining $44$ move their head to the left. Wh...
100
Sai Krishna @thechaoticneuron.bsky.social · 25/11/2024
Question. What is the best way to query a HUGE polygons layer on PostGIS - using a small grid polygon. Basically, I only want the polygons in the grid. Tried to intersect both layers, but it is taking forever to run. Any hacks? #GIS #Geospatial
000
Sai Krishna @thechaoticneuron.bsky.social · 24/11/2024
One of the foremost Statisticians from India PC Mahalonobis: #Statistics is a universal tool of inductive inference, research in natural & social sciences & tech applications #Stats .'. must always have purpose, either in the pursuit of knowledge or in promotion of human welfare #StatsSky #rstats
021
Sai Krishna @thechaoticneuron.bsky.social · 23/11/2024
When we do OLS regression, we assume normality of errors to calculate prediction intervals. This issue becomes critical there. We can still estimate conditional expected value of the response E(Y|X) without this assumption, but can’t make individual predictions. #rstats #Statistics #DataScience
051
Sai Krishna @thechaoticneuron.bsky.social · 23/11/2024
I write Applied/Computational #Statistics blogs Here is my latest one on the Omitted Variable Bias (OVB) that messes up causal inferences and other interpretations of an OLS regression. medium.com/@saikrishna_... Let's see how #bluesky reacts! #DataScience #rstats #stats #StatEd
medium.com
Omitted Variable Bias (OVB)
You performed a regression between house prices and area and obtained a coefficient (β) for area.
031