Articles on probabilities

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A statistics professor used his expertise in calculating probabilities to come up with a 98 winning percentage for Tim Hortons popular Roll up the Rim contest. (Photo Illustration/The Conversation)

Here’s how I cracked Roll up the Rim and won (almost) every time

Tim Hortons changed Roll up the Rim to include a digital element. A statistician correctly predicted that playing on the last day of the contest would dramatically increase the odds of winning.
By adding a ‘digital roll’ to its iconic game, Tim Hortons’ Roll up the Rim contest now has some statistical similarities to slot machines. (Photo Illustration/The Conversation)

Roll up the Rim: How COVID-19 has changed the contest — and maybe your odds of winning

The Tim Hortons coffee chain has made some changes to its iconic Roll up the Rim contest, including the addition of "digital rolls." A statistician explains how this changes the odds of winning.
People are bad at weighing risk, which is why so many Americans don’t get flu shots. AP Photo/David Goldman

How to deal with life’s risks more rationally

People have to make countless decisions on a daily basis that involve some degree of risk, from boarding a plane to crossing the street. The trouble is most of us don't weigh risk well.

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