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Brendan O'Connor

5 months ago

in ML and Stats People on Twitter on Inductio Ex Machina
Great to see this list pulled together, thanks!

7 months ago

in Statistical Analysis and A/B Testing on 20bits
The most important thing to know is a software package to use -- you don't want to muck around coding this yourself. R's t.test() is a good choice. (I guess Excel is good too.)
1 reply
hadley If you're going to use R, why not actually use the appropriate test - in this case it would be prop.test() for testing the different between two proportions.

7 months ago

in Statistical Analysis and A/B Testing on 20bits
The most important thing to know is a software package to use -- you don't want to muck around coding this yourself. R's t.test() is a good choice. (I've heard Excel can do it too I suppose.)

8 months ago

in Voting Machines on The Gong Show
Nice post. I just voted here, by paper! (Last year we had electronic. Not sure why/when/how the "regression" happened...)

> So, I grant that electronic voting machines are scary because
> they are so difficult to debug, and it would probably require PhDs
> in EE and CS to confidently verify they are working properly

Check out this report written by, indeed, some PhD's on the security of one electronic voting system. It's a bit, ahem, negative. (There's a pretty short summary on the first few pages).

http://www.sos.ca.gov/elections/voting_systems/...

1 year ago

in A Meta-index of Data Sets on Inductio Ex Machina
An addition: Many Eyes -- a site where anyone can upload data sets. It also has visualizations people have done.
http://www.many-eyes.com/
http://services.alphaworks.ibm.com/manyeyes/home
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