About Jiri | Bibliography 

Size of Things

Size and Amount of Multiple Things

Multiple Things 

Multiple things may be grains of sand but also stars of a globular cluster. 

Size is a geometric dimension expressed usually in linear units. It is the independent distribution variable, mostly indicated as X variable. 

Amount is a quantity defined by a number of items, by an area, volume or mass. It is the dependent distribution variable,  mostly indicated as Y variable. 

Distribution displays the dependent variable as a function of independent variable in order to quantify the size and amount of multiple things. . 

Distribution models are defined by special mathematical functions. The easiest description is their graphical appearance:

rectangular distribution, 
hyperbolic distribution; 

In the next text, I will focus onto the distribution around a central value, based on symmetric decrease to both sides. This distribution was defined by Carl Friedrich Gauss.