Читать книгу Statistics and Probability with Applications for Engineers and Scientists Using MINITAB, R and JMP - Bhisham C. Gupta, Irwin Guttman - Страница 40

A variable is a characteristic of interest that may take different values for different elements.

For example, an instructor is interested in finding the ages, heights, weights, GPA, gender, and family incomes of all the students in her engineering class. Thus, in this example, the variables (characteristics of interest) are ages, heights, weights, GPA, gender, and family incomes.