"The most intuitive way to describe the data mining problem to a nonstatistician is through what is called **the birthday paradox**, though it is not really a paradox, simply a perceptional oddity. "**If you meet someone randomly, there is a one in 365.25 chance of your sharing their birthday, and a considerably smaller one of having the exact birthday of the same year**. So, sharing the same birthday would be a coincidental event that you would discuss at the dinner table. **Now let us look at a situation where there are 23 people in a room. What is the chance of there being 2 people with the same birthday? About 50%.** For we are not specifying which people need to share a birthday; any pair works." --- **Tags** -- [[quotes]], [[birthday-paradox]], [[fooled-by-randomness]], [[statistics]], [[data-analytics]], **Source** -- [[202410121132 - B - Fooled by Randomness]], [[correlation]]