Standard deviation from ungrouped data. The standard deviation is a summary measure of the differences of each observation from the mean. If the differences themselves were added up, the positive would exactly balance the negative and so their sum would be zero. Consequently the squares of the differences are added.
A pissant, also seen as piss ant or piss-ant, refers to a specific type of ant. The word is also used as a pejorative noun or adjective, indicating insignificance.he original pissant is any of a certain group of large ant species, commonly called wood ants, that make mounded nests in forests throughout most of Europe.
All of these ants are about a 1/16th of an inch long. Little: From 2 to 3 pennies thick: Acrobat ant, Argentine ant, Cornfield ant, Pavement ants, White Footed ant, and some species of Odorous House ants. These ants are about an 1/8th of an inch to just over an 1/8th.iny: Ants as small as 1 to 2 pennies are thick: Big Headed ants, Thief ants, Pharaoh ants, Rover ants, some species of Odorous house ants, Ghost ants, Large yellow ants, and Little Black ants. (Yes, there is a little black ant species named: Little Black ants.