5 year anniversaries happening at once

As of the 23rd May 2022 this website is archived and will receive no further updates.

understandinguncertainty.org was produced by the Winton programme for the public understanding of risk based in the Statistical Laboratory in the University of Cambridge. The aim was to help improve the way that uncertainty and risk are discussed in society, and show how probability and statistics can be both useful and entertaining.

Many of the animations were produced using Flash and will no longer work.

In the last few days my facebook newsfeed has been seemingly full of 5 year anniversaries! Several couples I know who met 5 years ago, and several people I know who have children whose 5th birthday it is. This feels like a cooincidence, leading me to think - "wow, what happened in March 2010?". But it is probably not statistically that unlikely, since we are only talking about 4 5 year anniversaires, and I have about 900 facebook friends. I am 27 so I suppose that probably increases the chances of this happening slightly - its probably more likely that people in their early twenties will meet an important partner/have a baby than some other age brackets!
Total votes: 312
Date submitted:Fri, 20 Mar 2015 17:37:11 +0000Coincidence ID:8047