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Updated: Jun 17, 2026

Measurement of Lifespan in Drosophila melanogaster
Published on: January 7, 2013
[Life just is not fair - and statistics do not make it any better]
Lars Folkestad1, Michael Gejl Jensen, Mikkel Brabrand
1Medicinsk Center, Sydvestjysk Sygehus Esbjerg, Esbjerg. larsfolkestad@surfmail.dk
Introduction:
We have all tried it: it is pouring down with rain, we reach for the keys, and choose the wrong one. The mathematical probability for choosing the correct key - out of two - is 50%. During the 1990s, candy.scient. Jarle Gundersson (JG) proposed a mathematically unexplainable factor of uncertainty. He used the above example with the keys and concluded that the real, or observed, probability for choosing the correct key was 5-10%. The discrepancy between the mathematical and real probability was, according to JG, caused by The Awfulness of Being Concept. In this article, we present the results from a study and demonstrate the difference between the mathematical and the observed probability of success in two different scenarios (winning a coin toss and choosing the correct key in the first attempt).
Material And Methods:
Questionnaire survey performed at the Regional Hospital of Esbjerg 18-19 September 2009 using staff as questionnaire respondents.
Results:
We found a discrepancy between the mathematical and observed probability in both scenarios, 64% and 68% of the cases in the two scenarios, respectively. We also found that there is a negative correlation between age and the probability that one will win a coin toss, but a positive correlation between age and choosing the correct key. The results lacked any statistical significance.
Conclusion:
We hypothesised that you will always loose in a coin toss and never choose the correct key when there are two choices. The study demonstrated that this was incorrect, but there was a difference between the mathematical and the observed probabilities in most of the cases.
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