Statistical noun interpretation variables Statistical noun interpretation: variables

In elementary mathematics, variables are alphabetic characters representing numbers, which are arbitrary and unknown. Taking variables as explicit numbers, algebraic calculation can solve many problems in one calculation.

The concept of variables is also the basis of calculus. The general function y = f(x) involves two variables y and x, which represent the value and parameters of the function respectively. The word "variable" comes from the fact that when a parameter (also called "variable of function") changes, its value will change accordingly.

Statistical variable

Statistical absolute quantity indicators can be divided into discrete variables and continuous variables according to continuity. It can be divided into deterministic variables and random variables according to their properties.

1. Discrete variable

Discrete variables can also be called discrete indicators, which can only be expressed as a whole. Can be obtained by counting, the smallest unit can only be an integer, can only be divided by a limited number of times. Such as the number of employees and enterprises.

2. Continuous variables

A continuous variable can also be called a continuous index, which can be a decimal in the case of the smallest unit and can be divided infinitely. Such as a person's height.