Data interpretation is the most scoring but time consuming section in competitive examinations. But If you understand carefully, Data Interpretation problems can be solved with little ease with some easy tricks. Here are some important techniques to make Data Interpretation calculations fast.
- The presentation of data is classified into various categories viz. Bar Graphs, Line Graphs, Pie Charts, Data Tables, Mixed Graphs, etc.
- Nearly all DI questions are founded upon these three chapters of Mathematics viz. Percentages, Averages and Ratios.
Radar Chart
In this article, we are discussing the Radar Chart . Radar chart also known as a Spider Chart because its shape like spider and its has zero central point.
In this diagram, every value is represented with respect to a central point. All the changes in the values are expressed in the form of distance from the central point. Radar chart is not used for identifying the accuracy in data, but rather generalized relationships between data.
Sample Question:
In this question you have given number of mobile phones manufactured(in thousand) by 6 different companies in the years 2001 and 2002. Lets see this first from Table and Bar chart.
Number of mobile phones manufactured(in thousand) by 6 different companies in the years 2001 and 2002
Table chart
Bar chart
Radar Chart
We have seen the data through Table and Bar chart. Now we calculate this data through Radar chart.
Number of mobile phones manufactured(in thousand) by 6 different companies in the years 2001 and 2002
As you can see Blue lines indicate year 2001 and Red line indicates year 2002.
Let’s Solve the problems.
1. In 2002,Which company manufactured the maximum number of Mobile Phones?
(a) Nokia
(b) Sony
(c) Apple
(d) Samsung
Solution:
From the Chart you can clearly see the maximum number of Mobile Phones manufactured by Apple in 2002= 30,000 , Answer C
2. What is the average number of Mobile phones (in thousand) manufactured by all companies taken together in 2001?
(a) 17.5
(b) 18.5
(c) 20
(d) 22
Solution:
In 2001 Mobile manufactured,
Nokia= 20000, Micromax=10000, Samsung=5000, Apple= 10000, Sony=35000,HTC=25000
Total=20+10+5+10+35+25/6=105/6=17.5 Thousand, Answer A
3. The respective ratio between the number of Mobile Phones manufactured by Micromax in 2001 and that by Samsung in 2002 is ?
(a) 3 : 4
(b) 4 : 5
(c) 1 : 2
(d) 7 : 8
Solution:
The number of Mobile Phones manufactured by Micromax in 2001= 10000
The number of Mobile Phones manufactured by Samsung in 2002= 20000
Required Ratio= 10000 : 20000= 1 : 2, Answer C
4. The difference between the number of Mobile Phones manufactured by Nokia, Micromax and Samsung in 2001 and that by Apple , Sony and HTC in 2002 is ?
(a) 20000
(b) 30000
(c) 22000
(d) 25000
Solution:
The number of Mobile Phones manufactured by Nokia, Micromax and Samsung in 2001, = 20 +10 +5=35000
The number of Mobile Phones manufactured by Apple , Sony and HTC in 2002, =30 +20 +10=60000
Required difference= 60000-35000= 25000, Answer D
5. What is the percentage increase in production of Mobile Phones by Apple in 2001 in comparison to that in 2002?
(a) 200%
(b) 100%
(c) 300%
(d) 250%
Solution:
Production of Mobile Phones by Apple in 2001= 10
Production of Mobile Phones by Apple in 2002= 30
Percentage increase= 30-10/10 X 100% = 200%, Answer A
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