4th Class Mathematics Data Handling Data

   Data

The information which is collected in the form of numerals called data. The population of Hong - Kong is 7008300, here 7008300 is a numeral which contains information about the population of Hong-Kong. So it is a data.  

Raw Data

The initial data that the observer collects himself is called raw data. Like Jennifer asks to her class mates about their age one by one and note them which is as 8, 7, 6, 5, 7, 9, 8, 8, 8, 7, 9, 8, 10. It is the initial data which has been collected by the observer (Jennifer) herself. So it is a raw data.  

Grouped Data

To extract the information contained by the data easily, the data is arranged in ascending or descending order using tables. In the above, it is not easy to extract certain information from the data collected by Jennifer because it is not arranged in any specific order. Let's arrange the data collected by Jennifer in ascending order 5, 6, 7, 7, 8, 8, 8, 8,9, 9, 10. This form of data is called grouped data.