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CHAPTER 9 DATA HANDLING
Data is a collection of numbers which is gathered in order to give some information.
Representing data in the form of bars of uniform widths is called a bar graph or bar diagram.
A scale can be used for the graph. E.g. 1 unit= 50 students
Data can be represented in a tabular form using tally marks.
It is used to represent data in one the form of pictures or objects.