Introduction to Data Interpretation
Direction: A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions.
 The average height of all the peaks (in metre) is

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According to given bar graph , we have
Total height of all the peaks = 8200 + 6000 + 8600 + 7500 + 8800 + 6500
Number of mountain peaks = 6Required average height = Total height of all the peaks Number of mountain peaks Required average height = 8200 + 6000 + 8600 + 7500 + 8800 + 6500 6
Correct Option: B
According to given bar graph , we have
Total height of all the peaks = 8200 + 6000 + 8600 + 7500 + 8800 + 6500
Number of mountain peaks = 6Required average height = Total height of all the peaks Number of mountain peaks Required average height = 8200 + 6000 + 8600 + 7500 + 8800 + 6500 6 Required average height = 45600 = 7600 metre 6
Direction: Study the bar diagram and answer the following questions. The bar diagram shows the number of bicycles parked in the parking space of a hall at various points of time.
 How many times, as mentioned in the graph, is the number of parked cycles above average?

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On the basis of given graph in question , we get
The average = 60
The number of parked cycles above average :Correct Option: D
On the basis of given graph in question , we get
The average = 60
The number of parked cycles above average :
Required answer = 6 times i.e., 95, 75, 85, 65, 75 and 65.
 What is the average number of parked cycles as seen from the graph?

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On the basis of given graph in question ,
Number of cycles parked from 9 am to 8 pm.
= 95 + 75 + 85 + 65 + 75 + 55 + 65 + 45 + 55 + 35 + 45 + 25 = 720
Total time = 12 hoursRequired average = Number of cycles parked from 9 am to 8 pm = 720 Total time 12 Correct Option: D
On the basis of given graph in question ,
Number of cycles parked from 9 am to 8 pm.
= 95 + 75 + 85 + 65 + 75 + 55 + 65 + 45 + 55 + 35 + 45 + 25 = 720
Total time = 12 hoursRequired average = Number of cycles parked from 9 am to 8 pm = 720 = 60 Total time 12
 What is the percentage decrease in the number of parked cycles between 7 pm and 8 pm? (in whole number)

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As per the given bar graph ,
The number of parked cycles at 7 pm
= 45
And The number of parked cycles at 8 pm = 25
Decrease = 45  25 = 20Required percentage decrease = Decrease × 100 The number of parked cycles at 7 pm
Correct Option: D
As per the given bar graph ,
The number of parked cycles at 7 pm
= 45
And The number of parked cycles at 8 pm = 25
Decrease = 45  25 = 20Required percentage decrease = Decrease × 100 The number of parked cycles at 7 pm Required percentage decrease = 20 × 100 = 44.44% 45
 The charges for parking is $ 1 per hour. What will be the total collection from 9 am to 7 pm?

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On the basis of given graph in question ,
Given , The charges for parking = $ 1 per hour
Number of cycles parked from 9 am to 7 pm.
= 95 + 75 + 85 + 65 + 75 + 55 + 65 + 45 + 55 + 35 + 45 = 695Correct Option: D
On the basis of given graph in question ,
Given , The charges for parking = $ 1 per hour
Number of cycles parked from 9 am to 7 pm.
= 95 + 75 + 85 + 65 + 75 + 55 + 65 + 45 + 55 + 35 + 45 = 695
∴ Collected amount = 695 × 1 = $ 695