Consultant in applied math, statistics, and data privacy

Houston
Joined November 2008
John D. Cook retweeted
I've had enough of these and similar claims about how TV transmissions and phone calls from the moon were technically infeasible. So let's take a closer look.
Replying to @RealCandaceO
The biggest thing for me is the fuel tank size, plus the live broadcast with audio from the moon. In 1969. I just cannot.
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John D. Cook retweeted
“When you have eliminated the impossible, whatever remains is often more improbable than your having made a mistake in one of your impossibility proofs.” -- Steven Kass
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John D. Cook retweeted
Students don't need a perfect teacher. Students need a happy teacher, who's gonna make them excited to come to school and grow a love for learning.
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John D. Cook retweeted
Stumbled across a homework problem: "Assume the number of children in a family is normally distributed with a mean of 0.9 and a standard deviation of 1.1. ..." That implies a greater than 20% chance of having a negative number children.
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John D. Cook retweeted
An Altuve is a distance equal to 5 feet 5 inches, the height of Houston Astros player José Altuve.
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TIL: The browser name "Mozilla" was originally a portmanteau of "Mosaic killer," i.e. an attempt to displace the Mosaic browser.
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pop music is about 70 years old call it 71.5 years to make the math easy so the distribution is that 70% of music streamed comes from 70 years, and 30% comes from 1.5 years this is an insane 20:1 popularity ratio, which is the exact opposite of what the tweet wants to imply
Neil Young pulling his music from Spotify matters more than you'd think, given the popularity of old music. 70% of the music streamed online is older than 18 months. trib.al/ZSE2v9x
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John D. Cook retweeted
Am I doing it right?
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Mental math trick segues into a discussion of optimization and reification johndcook.com/blog/2022/01/2…
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Improving a proxy at the expense of making the real thing worse is EXTREMELY common.
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“The map is not the territory.” “Well duh! Everyone knows that.” “Their actions suggest otherwise.”
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John D. Cook retweeted
'The infinite we shall do right away. The finite may take a little longer.' -- Stanislaw Ulam
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“Devils can hide in the books and crannies of otherwise good things.” — C. R. Wiley
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John D. Cook retweeted
"Once upon a time, my opinion of category theory was the same as my opinion of Facebook: if I ignore it for long enough, hopefully it will go away." -- Drew Armstrong math.miami.edu/~armstrong/NC… [pdf]
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John D. Cook retweeted
“Good habits are personal capital. They require investment, but many pay off 1000X over a lifetime.” ~ Michael (@mmay3r)
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John D. Cook retweeted
"The best way to secure data is never to collect it in the first place. Data that is collected is likely to leak." -- Cory Doctorow
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John D. Cook retweeted
"Novices are unaware of fine distinctions, and sophomores love to point them out, but experts know how to adjust the level of rigor to the appropriate level for a given discussion." Now that's a line.
New post: A general theory of sub-things johndcook.com/blog/2022/01/2…
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I doubt learning another spoken language would make much of a difference in most people's income. But learning different areas of business might. Being able to speak accounting and software development is valuable, or being able to speak law and statistics. 2/2
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