# Tables and Tabulation PPT (Graphical Representation of Data 1: Tables PPT and PDF)

What is Data or Variable? Why data is called variable in statistics? What are the importance of Data Presentation? What are the methods of Data Presentation? What is meant by Graphical Representation of Data? What is ‘tabulation’? Understand the concept of ‘data table’. Things to remember when creating a table

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# Graphical Representation of Data- Part-1 – Tables & Tabulation (Tabulation of Data and Things to Remember when Creating a Data Table)

“Science is organized knowledge…
Wisdom is organized life…
Immanuel Kant

What is Data or Variable?

Ø  Data or variables in biostatistics (statistics) are individual observations of a natural phenomenon or an experiment.

Ø  All scientific investigations involve observations on the variables.

Ø  Observations made on these variables are obtained in the form of DATA.

Ø  The reason for calling data as variables is because it has the tendency of variation.

Ø  For example, if you take the size of leaves of a rose plant with many leaves the value of the size of each leaf (individual data) shows variation.

Ø  The individual observations form the data and the data thus collected are called Raw Data.

Ø  The raw data is an ungrouped or unorganized data and it should be classified based on some criterions.

Ø  Only the classified or grouped data can be used for logical interpretations and further statistical analysis.

Data Representation Methods

Ø  Data presentation (representation): ‘For the maximum utilization of data and its correct interpretation, it should be presented in an appropriate way’.

Ø  Different types of data representations methods are:

(1).    Tables

(2).    Graphs / Charts