Long story; short pier: Clews
18 days ago by cshalizi
"And the time ... in physics class, when we were doing these basic (very basic) labs on probability, and I had a little handheld pachinko machine? With a bunch of balls, and evenly spaced rods, and stalls at the bottom? And you tilt it down, and all the balls roll to the top, and you tilt it back, and they come cascading down, and hit the rods, and either bounce left or right, and in the end you’ve got this lovely little bell curve of balls at the bottom, because law of averages and such most balls bounce left, then right, then left, or some combination thereof, and end up in the middle? And only a few go left-left-left-left, or right-right-right-right, and end up on either end? —Anyway, it’s my turn, so I tilt it down, then back again, and click-clack-click-clack-click, and wouldn’t you know it, I’ve got an almost perfect reverse bell curve. Towering stacks of balls to the left and right, and almost nothing at all in the middle.
"So I go to the teacher running the show and hold it out to him and say, okay, now what, smart guy? (“If it fails to agree, under novel experiments or with refined measuring techniques, it is not said that one should not be happy.”)
"And the teacher looks at the little handheld pachinko machine, cocks an eyebrow, tilts it down, tilts it back, clack-click-clack-click-clack. Perfect bell curve.
"“There,” he says. “Fixed it for you.”
"—And I can’t for the life of me tell you which of those gestures is the argument with the universe, and which the sermon on the way things ought to be, dammit. —And that might just be my problem."
funny:geeky
probability
central_limit_theorem
to_teach
at_that_moment_the_student_was_enlightened
"So I go to the teacher running the show and hold it out to him and say, okay, now what, smart guy? (“If it fails to agree, under novel experiments or with refined measuring techniques, it is not said that one should not be happy.”)
"And the teacher looks at the little handheld pachinko machine, cocks an eyebrow, tilts it down, tilts it back, clack-click-clack-click-clack. Perfect bell curve.
"“There,” he says. “Fixed it for you.”
"—And I can’t for the life of me tell you which of those gestures is the argument with the universe, and which the sermon on the way things ought to be, dammit. —And that might just be my problem."
18 days ago by cshalizi
in-cites - An Essay by Dr. David Donoho
november 2011 by cshalizi
Donoho on how to get highly cited. I suspect some of it is not entirely serious, but it's a bit hard to tell.
statistics
academia
bibliometry
wavelets
donoho.david
via:stodden
to_teach
to:blog
november 2011 by cshalizi
McSweeney's Internet Tendency: FAQ: The "Snake Fight" Portion Of Your Thesis Defense.
november 2010 by cshalizi
"Q: Do I have to kill the snake?
A: University guidelines state that you have to "defeat" the snake. There are many ways to accomplish this. Lots of students choose to wrestle the snake. Some construct decoys and elaborate traps to confuse and then ensnare the snake. One student brought a flute and played a song to lull the snake to sleep. Then he threw the snake out a window."
--- It would be a Bad Thing for me to send this to the graduate students, wouldn't it?
funny:geeky
funny:academic
snakes
academia
parody
to_teach
A: University guidelines state that you have to "defeat" the snake. There are many ways to accomplish this. Lots of students choose to wrestle the snake. Some construct decoys and elaborate traps to confuse and then ensnare the snake. One student brought a flute and played a song to lull the snake to sleep. Then he threw the snake out a window."
--- It would be a Bad Thing for me to send this to the graduate students, wouldn't it?
november 2010 by cshalizi
Low frequency cultural noise
may 2010 by cshalizi
Not only is that a great title (as Nick says), but it literally turns out we make the Earth move: "Abnormal cultural seismic noise is observed in the frequency range of 0.01–0.05 Hz. Cultural noise generated by human activities is generally observed in frequencies above 1 Hz, and is greater in the daytime than at night. The low-frequency noise presented in this paper exhibits a characteristic amplitude variation and can be easily identified from time domain seismograms in the frequency range of interest. The amplitude variation is predominantly in the vertical component, but the horizontal components also show variations. Low-frequency noise is markedly periodic, which reinforces its interpretation as cultural noise. Such noise is observed world-wide, but is limited to areas in the vicinity of railways. The amplitude variation in seismograms correlates strongly with railway timetables..."
geology
time_series
fourier_analysis
data_analysis
via:nick-watkins
to_teach
trains
may 2010 by cshalizi
The Black Damsel In Dating Distress - National - The Atlantic
march 2010 by cshalizi
... in which Ta-Nehisi Coates schools the Freakonomics crowd in the concept of "sample selection bias".
bad_data_analysis
the_american_dilemma
statistics
selection_bias
racism
coates.ta-nehisi
practices_relating_to_the_transmission_of_genetic_information
to_teach
march 2010 by cshalizi
Reed Richards, Financial Engineer « Rortybomb
february 2010 by cshalizi
"My new goal is to have a financial engineering [Monte Carlo simulation] blow up so bad modeling CDS portfolios that Jessica Alba needs to rush into the office in some sort of superheroine costume to save me."
funny:geeky
comics
finance
monte_carlo
to_teach
to_teach:financial-time-series
february 2010 by cshalizi
Choosing Your Workflow Applications
august 2009 by cshalizi
We should consider distributing this to the incoming graduate students. (Except we'd need to make it clear that using Word is NOT ACCEPTABLE.)
paper_writing
productivity_software
workflow
advice
healy.kieran
sweave
R
emacs
version_control
latex
to_teach
to_teach:undergrad-research
to_teach:ADA
august 2009 by cshalizi
Tirvengadum: Linguistic Fingerprints and Literary Fraud
june 2009 by cshalizi
Using the case of an author with a known pseudonym to test methods for establishing identity of authorship. Conclusion: it may be that <
literary_criticism
author-identification
hypothesis_testing
to_teach
via:chl
textual_criticism
june 2009 by cshalizi
The Devil is in Statistics
june 2009 by cshalizi
"My understanding of statistics is limited": no shit. Tagged "to teach" as an example of a generic, content-free way of deriding any statistical analysis whatsoever whose conclusions one dislikes.
statistics
utter_stupidity
iran
fraud
to_teach
via:abbas-raza
june 2009 by cshalizi
[0906.0858] Monte Carlo methods in statistical physics: Mathematical foundations and strategies
june 2009 by cshalizi
"n this pedagogical review, we start by presenting the probabilistic concepts which are at the basis of the Monte Carlo method. From these concepts the relevant free parameters--which still may be adjusted--are identified. Having identified these parameters, most of the tangled mass of methods and algorithms in statistical physics Monte Carlo can be regarded as realizations of merely a handful of basic strategies which are employed in order to improve convergence of a Monte Carlo computation. Once the notations introduced are available, many of the most widely used Monte Carlo methods and algorithms can be formulated in a few lines. In such a formulation, the core ideas are exposed and possible generalizations of the methods are less obscured by the details of a particular algorithm." --- If it can deliver on this promise, great.
monte_carlo
statistical_mechanics
statistics
simulation
stochastic_processes
to:NB
to_teach
june 2009 by cshalizi
CRAN - Package sspir
february 2009 by cshalizi
State-space modeling with linear/Gaussian state evolution and generalized linear models for the observations. Looks reasonable, lacks a few improvements like diffuse initial conditions in the Kalman filter.
state-space_models
time_series
R
filtering
state_estimation
to_teach
february 2009 by cshalizi
TA Frank: The change we need |
january 2009 by cshalizi
An illustration of the necessity for counterfactuals.
gore.al
satire
us_politics
the_continuing_crises
causality
to_teach
funny:laughing_instead_of_screaming
to_teach:data-mining
to_teach:undergrad-ADA
january 2009 by cshalizi
(Very) short reading list: unemployment in the 1930s. « The Edge of the American West
october 2008 by cshalizi
Beware your data.
great_depression
unemployment
econometrics
natural_history_of_truthiness
economic_history
rauchway.eric
official_statistics
statistics
to_teach
to_teach:data-mining
to_teach:undergrad-ADA
october 2008 by cshalizi
"A Note on the Cobb-Douglas Function": The Review of Economic Studies, Vol. 30, No. 2, (1963 ), pp. 93-94
april 2008 by cshalizi
Shorter Simon & Levy (1963): I am sickened by the weakness of your model's goodness-of-fit test. (Does make me reconsider the many papers I still see using Cobb-Douglas...)
econometrics
simon.herbert
levy.ferdinand
cobb_douglas_production_function
bad_data_analysis
linear_regression
to_teach
via:slaniel
to_teach:undergrad-ADA
have_read
april 2008 by cshalizi
"Weak inference with linear models" - Psychological Bulletin - Vol 84 Iss 6 Page 1155
april 2008 by cshalizi
"Dude! R^2 sux!" (I paraphrase.)
methodological_advice
linear_regression
statistics
anderson.norm
shanteau.james
via:moritz-heene
experimental_psychology
decision-making
to_teach
to_teach:complexity-and-inference
to_teach:data-mining
to_teach:undergrad-ADA
april 2008 by cshalizi
Statistics Data Sets
november 2007 by cshalizi
compilation listing at UMass Amherst, organized by relevant method. OK but not outstanding.
statistics
to_teach
data_sets
to_teach:undergrad-ADA
november 2007 by cshalizi
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