ELI5: Explain Like I'm 5

D21 – Janeček method

Okay, imagine you have a big group of numbers that you want to find the average of. The Janeček method, or d21 method, is a way to calculate this average in a more accurate way.

So, let's say you have 21 numbers. With the Janeček method, you arrange these numbers in a specific order based on their size. Then, you drop the smallest number and the largest number from the list.

After that, you take the average of the remaining 19 numbers. This average gives you a better idea of the central tendency of the data because it removes the influence of any outliers or extreme values.

Overall, the Janeček method helps you calculate a more reliable average by excluding the smallest and largest values in a group of numbers.