## Riya Agarwal is teaching live on Unacademy Plus

Data Intenpretation Based on Bar CHARTS INTRODUCTION

About Me . I hold a B.E degree in Electronics and Communication Engineering. CAT, 17: DI & LR-98.29 %ile. I would take you through the DI & LR lessons for CAT. Not all are born Einstein's but trust me with hard work and dedication we can together make it possible

Contribution of the topic Total Questions from DI & LR section: 32; All questions were in sets form, wherein each set comprised questions. 16 Questions i.e., 4 sets) on DI 16 Questions (i.e., 4 sets) on LR Data Interpretation (DI) Of the 4 sets on DI, 1 set i.e., 4 questions may be based on Bar Charts Hence, we can say 25% of DI may be cleared if we thoroughly prepare this topic. . NOTE: This analysis is based on previous year papers.

What is Data Interpretation? Data Interpretation or Data Analysis, as the name suggests, is all about data. Looking at life scientifically, we can say that life is all about DATA. It is all around us, almost everything is accompanied with data. From sales reports to trends to budget planning to almost every single operation, some calculations or the other are required. In this section, we explore these calculations. The basic idea that operates behind these questions is to test a candidate on his ability to make decisions and establish what would be the best recourse in different situation. Each set of question generally consist of multiple conditions and one is supposed to use these clues to solve the questions

Structure of Questions In the question, Data may be presented in any of the following form: 1. Tables 2. Bar Charts 3. X-Y Charts 4. Pie Charts 5. Cases (Representing Data) We need to solve it using the information given Note: In this course we are going to study Bar charts in detail

Bar Charts Bar diagrams are visual aids for presenting statistical data. A bar chart consists of bars, each of which is a thick box. The value of the reading of the bar is determined by the height of the bar. Very often in bar charts, different colours, shades, dots, dashes, etc. are used in the bars to distinguish between different continuous variables being Import and Export of Pakistan (1982-88) 120 5 100 I. 60 0.0 20 100- 1982-83 1983-84 1984-95 1985-86 1986-87 1987-88 0.0- Year 2011 2012 2013 2014

Key Skills Involved I. Read the figures given closely. I. Do not over-approximate just to simplify your task. Ill. DO NOT ASSUME information that is not given in the questions. Note: *Data Interpretation revolves around Arithmetic and calculation Speed *Focus and Practice is all you need

Example: The bar graph, given here, shows the number of tickets sold by 6 students A, B C, D, E and F during a fair. Observe the graph and answer questions based on it. SO 30 24 25 20 20 16 O 15 14 10 0 STUDENTS

Answer the following: Q1. Total number of tickets sold by A, B and C is (1) 45 (2) 44 (3) 42 (4) 40 Workspace: 30 25 20 20 16 14 15 10

Answer the following: Q1. Total number of tickets sold by A, B and C is (1) 45 (2) 44 (3) 42 (4) 40 Workspace: From the graph given in the question: Ticked sold by A 16 Ticked sold by B= 8 Ticked sold by C 20 Hence, the total number of tickets sold by A' B and C = 16 + 8 + 20 = 44 ..Answer is option (2) 30 25 20 20 16 14 15 10

Answer the following: Q2. The least number of tickets were sold by (2) F (3) A (4) D 30 Workspace: 25 20 20 16 From the graph given in the question: Least number of tickets were sold by D. He sold 7 tickets. 14 15 10 .:. Therefore, the correct answer is (4

Answer the following: Q1. What is the average value of the contract secured during the years shown in the diagram? (a) Rs. 103.48 crore (c) Rs. 100 crore (b) Rs. 105 crore (d) Rs.125.2 crore Workspace: Project Exports:Contracts Secured 200 150 100 50 141 143.9 100.5 67 1984 1985 1986 1987 1988 Value in Rs. crore

Answer the following: Q2. Compared to the performance in 1985 (i.e. taking it as the base), what can you say about the performances in the years '84, 85, '86, '87, '88 respectively, in percentage terms? (a) 150, 100, 211, 216, 97 (c) 150, 100, 200, 215, 100 (d) 120, 100, 220, 230, 68 (b) 100, 67, 141, 144, 65 Workspace: Project Exports:Contracts Secured 200 150 100 50 141 143.9 100. 67 1984 1985 1986 1987 1988 Value in Rs. crore

Answer the following: Q2. Compared to the performance in 1985 (i.e. taking it as the base), what can you say about the performances in the years '84, 85, '86, '87, '88 respectively, in percentage terms? (a) 150, 100, 211, 216, 97 (c) 150, 100, 200, 215, 100 (d) 120, 100, 220, 230, 68 (b) 100, 67, 141, 144, 65 Workspace: The answer to this question needs to derived from the figure itself. You should not make any calculations in this question. 200 We can see in the figure that the performance of year 150 1988 is the only one that is less than the year 1985. 10.100.5 This means that this will be the only year that will a percentage less than 100 and all others will be greater 50 than 100. Also, the difference between 1888 and 1985 0 is only 2 units and this means that there will not be huge difference in percentage for the two years. This helps us select option (a) as the correct answer. Project Exports:Contracts Secured 141 143.9 65 19841985 1986 1987 1988 Value in Rs. crore

Answer the following: Q3. Which is the year in which the highest percentage decline is seen in the value of contract secured compared to the preceding year? (a) 1985 (b) 1988 (c) 1984 (d) 1986 Workspace: Project Exports:Contracts Secured 200 150 100 50 141 143.9 100. 1984 1985 1986 1987 1988 Value in Rs. crore