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Archive for 'Encyclopedia'

It’s not the heat, it’s the heat index

Filed in Encyclopedia ,Ideas ,R
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PERCEIVED TEMPERATURE Click to enlarge (We got a request for a Celsius version of this post and since we are a full service website we created one and put it here). So, we were wondering, what’s this heat index we hear about? We went to the Wikipedia article on it. It is an index that […]

The 18 cent piece

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WHAT SET OF COINS MINIMIZES THE AVERAGE NUMBER OF COINS NEEDED TO MAKE CHANGE? We draw your attention to the cleverly-titled article What This Country Needs is an 18 Cent Piece. It’s a piece of recreational mathematics that asks the question “what set of coins minimizes the average number of coins needed to make change”? […]

It’s not the heat, it’s the heat index (Celsius edition)

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PERCEIVED TEMPERATURE (CELSIUS EDITION) Click to enlarge (If you would like to see the Fahrenheit version of this post, please go here.) So, we were wondering, what’s this heat index we hear about? We went to the Wikipedia article on it. It is an index that combines air temperature and relative humidity to convert a […]

What is the average temperature on earth?

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ACROSS ALL TIMES, DAYS, AND PLACES We were up at Yale the other week guest lecturing for Shane Frederick, who always hits us up with trivia questions. Here’s one question he asked us: What’s the average temperature on the earth? That is, what’s the average surface temperature over all places on the earth (inhabited or […]

How large is the great Pacific garbage patch?

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1.6 MILLION SQUARE KILOMETERS OF GARBAGE IN PERSPECTIVE This Nature Scientific Reports article gives an update on the size of the Great Pacific Garbage Patch. It is estimated to be four to 16 times larger than previously estimated: 1.6 million square kilometers. While the article does show the patch along with latitude and longitude lines […]

You probably underestimate the populations of Eastern states and the areas of Western states

Filed in Articles ,Encyclopedia ,Ideas ,Programs ,Research News
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NEW PAPER, NEW PRODUCT FEATURE USING PERSPECTIVE PHRASES Click to enlarge As mentioned a few times in past posts, we’ve been doing research on how “perspective sentences,” for example “Israel is about the size of New Jersey in area and population” helps Americans comprehend measurements beyond simply saying “Israel has an area of 20,770 square […]

At last, an affordable quincunx

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EXPERIENCE THE BINOMIAL AND NORMAL DISTRIBUTIONS The Random Walker is an inexpensive mini quincunx Every since taking Stephen M. Stigler’s class on the history of statistics at Chicago, we’ve been wanting to get our hands on a quincunx. A quincunx, also referred to as a Galton Board or bean machine (*) is one of these, […]

Random walking

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BAGEL SHOP IDEA I was sitting in a bagel shop on Saturday with my 9 year old daughter. We had brought along hexagonal graph paper and a six sided die. We decided that we would choose a hexagon in the middle of the page and then roll the die to determine a direction: 1 up […]

The journal Judgment and Decision Making preliminarily ranks 9 out of 104 journals in replicability

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JDM IS TOO LEGIT TO CEASE IN ITS REPLICABILITY The R-Index blog was created by Ulrich Schimmack and aims to increase the replicability of published results in psychological science. Recently, the blog created rankings of 104 psychology journals in terms of replicability and published preliminary results. More detail can be found here. We were pleased […]

How long do you need to flip a coin to see a streak?

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STREAK RESULTS FOR LIKELY (>50%) and HIGHLY LIKELY (>99%) Click to enlarge From research on the hot hand to the observation that people don’t create enough streaks when instructed to create pseudo random data, the decision science community is pretty interested in the perception of streaks. One day we got to wonder, how long would […]