**5.1 INTRODUCTION TO DATA HANDLING:**

Data handling means to collect and present the data so that it could be used in further studies and to find some results.

**Data**

Any information collected in the form of numbers, words, measurements, symbols, or in any other form is called data.

**Graphical Representation of Data**

The grouped data can be represented graphically for its clear picture and it is the easiest way to understand the data.

**Types of Graphs:**

**Pictograph.**

When we represent the data through pictures or symbols then it is called a Pictograph.

Here one tree represents 10 trees. And we can easily read the pictograph.

The graph shows that there are 30 trees of apple and so on.

**Bar Graphs.**

In the bar graph, the information represented by the bars of the same width with equal gaps but the height of the bars represents the respective values.

Here, the names of pets are represented on the horizontal line and the values of the respective pets are shown by the height of the bars. There is an equal gap between each bar.

**Double Bar Graph.**

To compare some data we can use the double bar graph as it shows the information of two quantities simultaneously.

Here, in the above graph, it represents the marks of the students in two different tests altogether. So we can compare the marks easily.