**Bar Charts**

A **bar graph** is
a chart that uses bars to show comparisons between categories
of data. The bars can be either horizontal or vertical.Bar
graphs with vertical bars are sometimes called vertical bar
graphs.

This section comprises
of questions in which the data collected in a particular discipline are
represented in the form of vertical or horizontal bars drawn by selecting a
particular scale.

One of the parameters is plotted on the horizontal axis and the other on the vertical axis.

The candidate is required to understand the given information and thereafter answer the given questions on the basis of data analysis

__Useful tips:__

**1. Read the question
carefully**

The first and the most
important step in solving any Data Interpretation question is to read the
question carefully. You should read all the data that comes with the graphs or
table in the question. Many a times, the data given below the graph turns out
to be more important than most of the numbers in the graphs.

**2. Analyse the Data
Carefully**

The next step is to
analyse the given graph/data carefully. Do not try to see the questions first
and find out the answers accordingly. You will waste your time following that
method. Try to understand the graph. Look at the statistics for each bar graph
or chart. Look carefully at the labels.

**3. Don’t worry about too
much data**

Try to understand the
question. Sometimes, the question contains lots of data that is unrelated and
not required for answering the questions. When you look at the question you may
get discouraged by the lengthy tables or by the amount of information below the
graphs. But, if you were to understand what the data is about and then look at
the question, you may find that you only have to use part of the data. Hence,
it is important that you do not get disheartened by the size of the data and
skip the question without looking closely at it.

**4. Skip Questions that
need too much Calculation**

Some questions ask too
much from you. They require lots of calculation in order to be solved. These
questions are known as the speed-breakers. Such questions are best left alone,
at least in the first round. Once you have finished solving all the easy
questions and still have time for the section to end, you should attempt these
questions. If you try such questions, you will lose your precious time on them
and may not be able to attempt some simple questions that may follow.

**5. Avoid Unnecessary
Calculations**

We have a habit from our
school days to solve questions in a step by step method. This is a very good
habit for school exams but a really bad habit when it comes to attempting competitive
examination and various entrance test. There are many unnecessary calculations
that we do which cost us a precious few seconds per question. Sometimes, there
are many steps that can be skipped but we still do it as we are trained to
solve in a step by step method. Learn to skip those steps.

**
6. Pay close attention to the units used**

Sometimes, the questions
may use a different unit for the question and another unit for the data.

**For example,** the data
given may be about sales volume in Millions. However, the question may ask
about sales volume in lakhs. If you do not pay close attention to the unit, you
may chose the wrong answer.

Another question may
talk about two roads for example and may give the time in hours in one case and
minutes in another. Always convert the units into the ones asked. So, if the
question asks how many minutes it will take, convert the data given in hours
into minutes. Or if the question asks in hours, convert the data in minutes to
hours.

**7. Learn to Approximate**

You do not need to find
the exact answer always. Many a times, the options given are far enough from
each other to give you enough room for approximation. So, **for example**, if
you are asked to divide 362678/181234, you can easily approximate that the
answer will be somewhere around 2 by looking at the first 2 numbers only. 54/18
is 2. So, instead of dividing it and finding the accurate answer, try to find
an approximate answer. This will give you the correct answer more often than
not. If however, the options are close, you will still be able to eliminate 1
or 2 options easily.

**
8. Don’t assume anything**

Sometimes there are
questions which asks to find out something holistic data for which is not
available. Always be alert enough to see whether the data given is enough to
answer the question or not and do not go forward with answering the questions
based on assumptions.

**9. Learn to skim through
data**

Some graphs have a lot of data associated them and not all of which is required to solve the questions. Skimming through the data and avoiding mess is an important part of the process. So focus on what is required in the question rather than on all the data.