## Introduction to Data Interpretation

#### Data Interpretation

Direction: Study the following bar–diagram carefully and answer the questions.

1. The ratio of the number of years, in which the foreign exchange reserves are above the average reserves, to those in which reserves are below the average reserves, is

1. From the given bar diagram , we see
Total foreign exchange reserves = 2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120
Total number of years = 8

 Average foreign exchange reserves = (2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120) million dollar 8

 Average foreign exchange reserves = 27840 million dollar 8

##### Correct Option: C

From the given bar diagram , we see
Total foreign exchange reserves = 2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120
Total number of years = 8

 Average foreign exchange reserves = (2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120) million dollar 8

 Average foreign exchange reserves = 27840 million dollar 8

Average foreign exchange reserves = 3480 million dollar
Years that have more than average foreign exchange reserves ⇒ 2007, 2011, 2012
Number of the foreign exchange reserves above the average = 3
Number of the foreign exchange reserves below the average = 5
Required ratio = 3 : 5

1. What was the percentage increase in the foreign reserves in 2012 over 2008?

1. According to given bar graph , we have
The foreign reserves in 2012 = 5040
The foreign reserves in 2008 = 2520
Increase = 5040 - 2520 = 2520

 Required percentage increase = Increase × 100 The foreign reserves in 2008

##### Correct Option: A

According to given bar graph , we have
The foreign reserves in 2012 = 5040
The foreign reserves in 2008 = 2520
Increase = 5040 - 2520 = 2520

 Required percentage increase = Increase × 100 The foreign reserves in 2008

 Required percentage increase = 2520 × 100 = 100% 2520

1. The foreign exchange reserve in 2012 was how many times that in 2009?

1. On the basis of given graph in question ,
The foreign exchange reserve in 2012 = 5040
The foreign exchange reserve in 2009 = 3360

 Required answer = The foreign exchange reserve in 2012 The foreign exchange reserve in 2009

##### Correct Option: D

On the basis of given graph in question ,
The foreign exchange reserve in 2012 = 5040
The foreign exchange reserve in 2009 = 3360

 Required answer = The foreign exchange reserve in 2012 The foreign exchange reserve in 2009

 Required answer = 5040 = 1.5 3360

Direction: The bar graph given below shows the per acre yield (in kg) of different countries. Study the graph carefully and answer the questions.

1. Writing the yields of all countries in ascending order, the difference between the sum of yields of first three countries to that of last three countries is

1. From the given bar diagram , we see
Ascending order of yield per acre : 80 < 120 < 120 < 132 < 160 < 200
Sum of yields of first three countries = 132 + 160 + 200 = 492
Sum of yields of last three countries = 80 + 120 + 120 = 320
Required difference = Sum of yields of first three countries - Sum of yields of last three countries

##### Correct Option: C

From the given bar diagram , we see
Ascending order of yield per acre : 80 < 120 < 120 < 132 < 160 < 200
Sum of yields of first three countries = 132 + 160 + 200 = 492
Sum of yields of last three countries = 80 + 120 + 120 = 320
Required difference = Sum of yields of first three countries - Sum of yields of last three countries
∴ Required difference = (492 – 320) kg. = 172 kg.

1. Sri Lanka’s yield (approximately) is what percent of total yield of all the countries?

1. On the basis of given graph in question ,
Total yield of all the countries = 80 + 120 + 132 + 120 + 160 + 200 = 812
The per acre yield of Sri Lanka = 132

 Required percent = The per acre yield of Sri Lanka × 100 Total yield of all the countries

##### Correct Option: B

On the basis of given graph in question ,
Total yield of all the countries = 80 + 120 + 132 + 120 + 160 + 200 = 812
The per acre yield of Sri Lanka = 132

 Required percent = The per acre yield of Sri Lanka × 100 Total yield of all the countries

 Required percent = 132 × 100 ≈ 16.2 812