Presenting grouped data

1. How is grouped data represented?
2. Which data presentation is used for grouped data?
3. What are the 3 best rules for data grouping?
4. How to convert raw data into grouped data?

How is grouped data represented?

Grouped data means the data (or information) given in the form of class intervals such as 0-20, 20-40 and so on. Ungrouped data is defined as the data given as individual points (i.e. values or numbers) such as 15, 63, 34, 20, 25, and so on.

Which data presentation is used for grouped data?

Presentation of data in groups along with the frequency of each group is known as the frequency distribution of the grouped data.

What are the 3 best rules for data grouping?

Guidelines for classes

The classes must be all inclusive or exhaustive. This means that all data values must be included. The classes must be continuous. There are no gaps in a frequency distribution.

How to convert raw data into grouped data?

Divide the data into five groups, namely, 0-5, 5-10, 10-15, 15-20 and 20-25, where 0-5 means marks greater than or equal to 0 but less than 5 and similarly 5-10 means marks greater than or equal to 5 but less than 10, and so on. Prepare a grouped frequency table for the grouped data.