Reading bar graphs :
We consider Multiple or Grouped Bar diagrams to compare related series. Component or sub-divided Bar diagrams are applied for representing data divided into a number of components. Finally, we use Divided Bar charts or Percentage
Bar diagrams for comparing different components of a variable and also the relating of the components to the whole. For this situation, we may also use Pie chart or Pie diagram or circle diagram.
Example 1 :
The total number of runs scored by few players in one-day match is given in the bar graph.
Which player did score the maximum runs ?
When read the above bar graph, it is clear that player no.5 scored the maximum runs. That is 70.
What is the ratio between the runs scores by player 2 and player 5 ?
Player 2 : Player 5 = 60 : 70 = 6 : 7
What is the difference between the runs scored by player 1 and 4 ?
Difference = |60 - 50| = 10
What percentage of runs did player 5 score more than player 4 ?
Difference between the runs scored by player 4 and 5 is
= 70 - 50
Required percentage = (20/50) x 100 %
= 40 %
Example 2 :
The number of students in each class of a school is given in the bar graph.
In which class, is the student strength maximum ?
When read the above bar graph, it is clear that the class 6 has the maximum strength. That is 450.
What is the ratio between the strengths of class 9 and class 10 ?
Class 9 : Class 10 = 400 : 350 = 8 : 7
What is the difference between the strengths in class 8 and class 10 ?
Difference = |425 - 350| = 75
What percentage of strength does class 6 have more than class 7 ?
Difference between the strengths in class 6 and class 7 is
= 450 - 400
Required percentage = (50/400) x 100 %
= 12.5 %
Example 3 :
The average temperature during the month of April in a city during the year 2007 to 2012 is given. Draw bar graph for the data.
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