The variable "refers to the characteristics of the population that we are interested in analyzing the characteristics of a population, where the value can be changed. Quantitative or quality, whether they like
Variable "refers to the characteristics of the population of interest is determined by the characteristics of the population can modify it. Whether quantitative or qualitative, for example.
The variable "means the characteristics of population we are interested in analyzing the characteristics of the population that can change the value. No matter in quantity or quality, such as