The Skeptical Teacher

Musings of a science teacher & skeptic in an age of woo.

Posts Tagged ‘innumeracy’

Prayer, Miracles, and Damned Statistics

Posted by mattusmaximus on April 7, 2010

We’ve all heard the line: There’s lies, damned lies, and then there’s statistics. The implication is that people can use statistics to deceive themselves and others.  But the opposite is also true: people often deceive themselves due to a stark ignorance of numbers & statistics (often referred to as innumeracy).

For example, at this time of year, at least in Christian circles, there is a lot of talk going around about prayer and miracles – usually in the guise of stories about supposedly “miraculous” healing.  And the media loves to give air time to these kind of anecdotal stories with nary a whiff of skepticism.  However, to its credit, ABC News did a segment recently with Elizabeth Vargas where she gave a fair amount of face-time to skeptic Michael Shermer.  Here are some excerpts from Shermer’s account of the interview at the really groovy SkeptiBlog…

Would I Ever Pray for a Miracle?

I really like how Shermer goes into the issue of large number statistics, confirmation bias, and believers counting the “miraculous hits” while discounting the enormous number of inevitable misses…

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Posted in mathematics, religion | Tagged: , , , , , , , , , , , , , , , , , , , , , , , , , | 2 Comments »

Why So Much of Polling is B.S. — F**k You, Frank!

Posted by mattusmaximus on October 3, 2009

“The numbers don’t lie” goes an oft-quoted saying… and that’s true, for the most part.  Numbers don’t lie, but what does lie is the people who are reporting the numbers.  The recent brouhaha over health care reform in the United States has brought this fact about numbers & statistics into stark relief of late.  Most people, when they read a poll, don’t really think about the numbers all that much, or they are too innumerate to really understand what they’re reading – which is how so many are easily manipulated.  And oftentimes the polls are self-contradictory.

For example, look at this recent article – which is, refreshingly, a good example of critical thinking in the modern media – concerning the question of polling public opinion on health care reform…

Health care polls leave pols dizzy

Legislators hoping to learn what their constituents think about the issue — and how to vote to keep them happy — face a dizzying deluge of hard-to-reconcile data, some of which suggests that voters are more than a little confused, as well.

What to make of it, for example, when one poll finds that 63 percent think “death panels” are a “distortion” or “scare tactic,” and only 30 percent think the issue is “legitimate,” while another finds that 41 percent believe that people would die because “government panels” would prevent them from getting the treatment they needed?

Or when one survey finds that 55 percent of Americans support the public option, while another says 79 percent favor one — but also notes that only 37 percent people surveyed actually knew what “public option” meant?

And because there is such ambiguity in these polls, those with an agenda can usually cherry-pick whatever data they want to make a case for their particular argument.  Even changing the wording of a particular question just slightly can have a huge impact…

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Posted in mathematics, media woo, politics | Tagged: , , , , , , , , , , , , , , , , , , , , | 5 Comments »

Las Vegas: A Town Based on Bad Math & Gullibility

Posted by mattusmaximus on July 15, 2009

During my recent trip to Las Vegas for TAM7, as with all my previous trips to “Sin City”, I noticed the large number of people gambling.  Now there is a certain social aspect to gambling, but a lot of people play these games of chance hoping that they’ll win it big.  They literally believe that, through some lucky charm or prayer, that they’ll hit the jackpot, and that’s exactly what the casinos want them to believe…


Of course, the casinos in Vegas are banking on a combination of people’s lack of critical thinking & skepticism, innumeracy (misunderstanding of math), susceptibility to the gambler’s fallacy, and basic gullibility – and based upon what I’ve seen, the casinos have been quite successful at cashing in on all of these things.

That’s because in addition to knowing basic human nature, the casinos also know the mathematical odds. They don’t say “the house always wins” for nothing, folks.  Even if someone occasionally wins it big (which will eventually happen by the law of large numbers, just as when someone wins the lottery), there are way more people who are losing money.  In the end, these casinos make much more money than they pay out.

Ironically, I saw the following slot machine sign while in Vegas…


In order to make this sign a more accurate reflection of reality, one of the O’s should be crossed out, because chances are that if you’re playing these games you’ll end up a loser.  So, statistically speaking, how does one win in Vegas (without cheating)?  The answer is simple, folks: you don’t play the game 🙂

Posted in mathematics, psychology | Tagged: , , , , , , , , , , , , , , , , , | 2 Comments »

Media Math

Posted by mattusmaximus on March 24, 2009

I saw this over at Wheat-dogg’s world, and I simply had to share it 😀

media math

Posted in humor, media woo | Tagged: , , , , , , , , , , , , , , , , , , , , | 1 Comment »

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