In order to see or observe the significant characteristics of a data set, it must be presented in an organized and systematic way. There are three ways to present data: textual, tabular, and graphical.

There are two ways of classifying data: grouped and ungrouped.

Ungrouped data - not organized; if arranged, could only be from highest to lowest or lowest to highest

Grouped data - organized and arranged into different classes or categories

Example:
A simple list of the birthdays of the students of a section is ungrouped data even if it arranged from first to last or last to first. But if it is listed by month, it is grouped data.

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