A variável numérica is a type of variable that represents measurable quantities, allowing for mathematical operations and análise estatística. These variables can take on a wide range of numeric values and are typically divided into two main categories: continuous and discrete.
Variáveis numéricas contínuas can take any value within a given range. For example, height, weight, and temperature are continuous variables because they can be measured with great precision and can take on an infinite number of values within a range. In contrast, variáveis numéricas discretas can only take specific, distinct values. An example of a variável discreta é o número de estudantes em uma sala de aula, que só pode ser um número inteiro.
In statistical analyses and data science, numerical variables are crucial because they allow for a variety of operations, including averaging, summation, and more complex mathematical modeling. They can also be used in various técnicas estatísticas, such as regression analysis, where the relationship between variables is explored.
Understanding numerical variables is essential for any data-driven field, as they provide the foundational data needed for analysis, modeling, and decision-making.