Uploaded April 2017 | Updated September 2026, 2 weeks ago

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This is the first of (hopefully) many videos where we explore data science concepts, doing the calculations in JavaScript, a language most are familiar with, and with no mathematical notation. First out is standard deviation, a statistical concept which is the average distance to the mean. I spend a lot of time talking about why statistics are important to a programmer, and why standard deviation exists and what it is good for, and we finally do an implementation of standard deviation in JavaScript.

🔗 My video on .reduce
youtube.com/watch?v=Wl98eZpkp-c&index=3&list=PL0zVEGEvSaeEd9hlmCXrk5yUyqUag-n84

My video on .map
youtube.com/watch?v=bCqtb-Z5YGQ&index=2&list=PL0zVEGEvSaeEd9hlmCXrk5yUyqUag-n84

🔗 Great video visualizing Standard Deviation
youtube.com/watch?v=MRqtXL2WX2M

🔗 What is a "Standard Deviation?"
(Great video explaining the math of standard deviation)
youtube.com/watch?v=dq_D30kyR1A

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