Читать книгу Statistics and Probability with Applications for Engineers and Scientists Using MINITAB, R and JMP - Bhisham C. Gupta, Irwin Guttman - Страница 47

In statistical applications, we often encounter large quantities of messy data. To gain insight into the nature of the data, we often organize and summarize the data by constructing a table called a frequency distribution table. In any statistical application (as noted in Section 2.2), we can have data that are either qualitative or quantitative. Qualitative and quantitative are sometimes referred to as categorical or numerical data, respectively. In this section, we discuss the construction of a frequency distribution table when the data are qualitative or quantitative.