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Archive for 'Ideas'

We can’t tell you why you would want to memorize e to 15 places, but we can tell you how

Filed in Encyclopedia ,Ideas
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MEMORIZE e TO 15 PLACES We recently asked a large group of people the question In the number e, how many places to the right of the decimal does the string ‘1828459045’ first occur? Many people replied “two”, which is wrong, but indicates that many people know that e is equal to 2.71828something Assuming you, […]

So you think you can graph?

Filed in Ideas ,Programs
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ONLY THREE DAYS LEFT TO SUBMIT: DEADLINE APRIL 14, 2019 Introducing a competition for graph design! Can you design a graph that BEST conveys the magnitude of the difference between two groups? Enter your graph into the contest! Details can be found here (Deadline April 14, 2019): http://amplab.colostate.edu/SYTYCG_S1/SYTYCG_Season1_ContestOverview.pdf Please distribute to other groups and individuals […]

How to eyeball a standard deviation

Filed in Encyclopedia ,Ideas ,R
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TEST YOUR ESTIMATION SKILLS Click to enlarge Suppose you are looking at the roughly normally distributed data above and you want to visually estimate the standard deviation. What would you guess? 20? 35? How would you do it? In a past post we talked about tips for drawing a normal distribution. In it, we noted […]

What’s the deal with wind chill?

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WIND SPEEDS UP HEAT LOSS Twenty years ago, a German colleague asked me what the deal was with wind chill. I guess they didn’t have it in Germany. I explained it was an attempt to communicate how it feels when there is a low temperature combined with wind.  But my colleague wanted to know how […]

Replication Markets Team Seeks Journal Partners for Replication Trial

Filed in Ideas ,Programs ,Research News
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TEST WHETHER PREDICTION MARKETS PREDICT REPLICATION AT YOUR JOURNAL This week we present a letter from a group embarking on an interesting project in which journals work with the team in order to test the effectiveness of prediction markets for predicting how well experiments replicate. “Recent attempts to systematically replicate samples of published experiments in […]

Reflections on the review process

Filed in Ideas ,Research News
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VIEWS FROM A VETERAN EDITOR After 13 years of editing journals (Journal of Marketing, International Journal of Marketing Research, Journal of Service Research), Roland Rust wrote up some of his thoughts on the review process. We quote here some bits we found interesting. You can read the full article here: Reflections on the review process […]

Lucky streaks put into perspective

Filed in Ideas
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USING A YEAR TO THINK ABOUT HOW LONG YOU NEED TO WAIT FOR A STREAK Click to enlarge The twitter account Maths Ed Ideas took one of our old posts and put it into perspective. If you had flipped a coin once every day of the year so far, you would be more than 99% […]

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

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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 […]