The Fractionator Principle. The fractionator principle is one of the important concepts used in stereology. The importance of this principle cannot be overlooked. It appears in many different places. Although it looks different depending on how it is used, the principle is the same.
In mathematics, a variable whose value is determined by the value of an independent variable. For example, in the formula for the area of a circle, A = Ïr2, A is the dependent variable, as its value depends on the value of the radius (r). Compare independent variable.
A variable is any factor that can be changed or controlled. In math, a variable is a quantity that can assume any value from a set of values. A scientific variable is a little more complicated, plus there are different types of scientific variables. Scientific variables are associated with the scientific method.