Tables (DI)

The data interpretation table is the simplest method adopted for summarizing and interpreting data in a meaningful way. Here in table charts data is arranged systematically in the form of rows and columns. This helps in easy comparison of facts and makes conclusions quickly.

Terms involved in Data Interpretation Table Chart

Title:

Generally, a small description of the information present in the table is given a title.

Column headings:

These headings generally represent the headings for data present in such columns. (units of data can also be represented here)

Row headings:                       

Here these represent heading for whole data present in such rows. (Units of data can also be representing here itself).

Headnote:

Here a small description to table with specific terms (like units) wise represented.

Footer note:

For representing additional data or any exceptional conditions, a footer note is used. This can be clearly understood by an example problem.

Data Tables

·        Data is presented for two or more parameters arranged in rows and columns.  

  •     The calculation to draw inferences are easy in terms of fromulae but lengthy and time consuming.
  •       Very detailed format, requires careful reading. Hence time consuming.
  •        Accurate Interpretation is possible
  •      The most basic and commonly used format. Forms the basis for preparing all graphical formats.

 Example :    Study the following table and answer the questions.

Classification of 100 Students Based on the Marks Obtained by them in Physics and Chemistry in an Examination.

Subject Marks out of 50
40 and above 30 and above 20 and above 10 and above 0 and above
Physics 9 32 80 92 100
Chemistry 4 21 66 81 100
Average (Aggregate) 7 27 73 87 100
 
Question :
What is the different between the number of students passed with 30 as cut-off marks in Chemistry and those passed with 30 as cut-off marks in aggregate?
 
Solution: 

Required difference

    = (No. of students scoring 30 and above marks in Chemistry)

       - (Number of students scoring 30 and above marks in aggregate)

    = 27 - 21 = 6.

Questions : If it is known that at least 23 students were eligible for a Symposium on Chemistry, then the minimum qualifying marks in Chemistry for eligibility to Symposium would lie in the range?

Solution:  Since 66 students get 20 and above marks in Chemistry and out of these 21 students get 30 and above marks, therefore to select top 35 students in Chemistry, the qualifying marks should lie in the range 20-30.