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Graphical Representations of Statistics

Graphical representations are important to tabulate the observations in Statistics. Without a proper graphical representation it will be completely problematic to understand a proper solution. In other words, graphical representation makes the solution easy for students.

What are the various types of graphical representations?

There are mainly four types for frequency distribution. These are –

  • Histogram

In this part of graphical representation the upper class and lower class boundaries as well as their heights are proportionate to their related frequencies.

Graphical Representations of Statistics 1

There is an exact formula in which the rfd ot relative frequency density must be on Y-axis and class intervals is there on X – axis. Now, Class intervals can be taken as continuous for the better result.  The exact formula is –

Graphical Representations of Statistics 2

Rfd=frequency/ (total frequency * class width)

Rfd is essential to find out in case the class width is not same.

Graphical Representations of Statistics 3

  • Frequency Polygon

In the histogram chart, if the joining line of the mid point is a straight line, then it is known as the frequency polygon.

  • Bar Charts

The frequency distribution is represented through bars and the center of the cells is considered as the mid points. Simple bar chart represents attributes in a single way.

Graphical Representations of Statistics 4

  • O Give

If the frequency distribution is more than or less than type, then it is known as cumulative distribution.

Graphical Representations of Statistics 5

 

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