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.
Size: Up to 1.0 cm (0.5 in) Meat Eating ants, also known as Meat ants or Gravel ants are omnivorous and will clean up dead animals as well as feeding on plant matter. They will also attack live animals, particularly if the animal has stumbled across their nest. They are very territorial.