Video yükleniyor...
Video Yüklenemedi
Taleb: "standard deviation is not how much something moves on average." ask anyone - even statisticians, even government agencies - and that's exactly the wrong definition you'll get back. what they're describing is mean absolute deviation. real standard deviation squares the moves first - which quietly hands almost all... show more
414,018 görüntüleme • 3 ay önce •via X (Twitter)
19 Yorum

The deeper philosophical problem is this: the standard deviation is the dispersion metric in almost all classical statistics precisely because it makes algebra tractable (squaring makes derivatives clean, distributions conjugate, etc.). It was chosen for mathematical convenience

Hey @nntaleb - has anyone bothered to prove/disprove or revise a single textbook? Or are they so hidebound they can’t?

@grok that standard deviation calculation in talebs example seems wrong. Can you check?

This is thoroughly embarrassing.

@grok show with simple numbers what professor taleb is teaching

Standard deviation isn’t “average movement.” It’s how bad the rare events can hit you. Most people still don’t get it.

Standard deviation = how well does the average represent the whole population

aleb banger is here

As far as I remember Taleb has a record of correct prediction precisly zero. It's easy to estimate events afterwards. It is called economics.

That's a solid point! It's wild how often definitions get mixed up. Precision matters, especially in stats. Glad you’re shedding light on this!

I don’t get what he is pointing out. Could you explain it again, please?

he is a true legend, i will save it

conditional tail expectation is where it's at

Thanks for sharing all these clips and lectures especially from Mr Taleb. Very interesting.

Very useful reminder. Difference between thinking what we know, and what we really know and then how we apply. Signal loss all over 😔

Love it, reminds me of the most interesting classes and lectures

Obvious things explained. it seems that @nntaleb just became old

Messi

taleb is dropping truth bombs as always. standardizing risks through mean deviation is really a trap for many.
