Archetype Definition: a common character, image, symbol, or situation that occurs in literature and in life, and considered to be universal across most cultures. Archetype examples are found in the world around us every day: in our speech, our beliefs, media, sports, video games, psychology, art, and even our dreams. Archetypes are universal; that is, they occur across all cultures, religions, and parts of history.
The above plot illustrates Poisson probabilities for Î» = 7.5. and this plot illustrates Poisson probabilities for Î» = 15. The mean of the Poisson distribution is Î». For the Poisson distribution, the variance, Î», is the same as the mean, so the standard deviation is âÎ». Empirical tests. There are also some empirical ways of checking for a Poisson distribution. 1  The simplest and handiest way is to see if the variance is roughly equal to the mean for your Poisson data.
Poisson's ratio (letter v) is a measure of the contraction that happens when an object is stretched.or example, if a block is being stretched as shown in the image to the right, the equation for the poisson's ratio will be: Poisson's ratio ranges from 0.0-0.5 for common materials, though for materials with certain structures, can be as low as -1.