is an extreme value that stand out greatly from the overall pattern of values in a dataset. In other words, it's a piece of data that is an abnormal distance from other points.

refers to a distortion or asymmetry that deviates from the symmetrical bell curve, or normal distribution, in a data set.

is the difference between the first quartile and the third quartile.

divides a given data into two equal parts.

divides a given data into for equal parts.

is a simple way for representing statistical data on a plot in which a rectangle is drawn to represent the second and third quartiles, usually with a vertical line inside to indicate the median value. The lower and upper quartiles are shown as horizontal lines either side of the rectangle.