data ion introduction (alpha)
TRANSCRIPT
8/8/2019 Data ion Introduction (Alpha)
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Data Interpretation
8/8/2019 Data ion Introduction (Alpha)
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What are you supposed to do?
Some information is provided in the
form of a -
Chart - Bar chart, Pie chart
Graph - Point graph, Line graph
Table, Or a combination of these.
You are supposed to answer
questions based on this information.
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This is the ³Reading
Comprehension´ inmathematics. The information
is available for the reference,you are supposed to ³read´
(interpret) it to answer th
equestions.
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Preparation
The ³mathematics´ required
for DI is mostly addition,subtraction, division and
multiplication. Quite a few of
the questions focus on
percentage.
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Types of DataPresentation
Tables
Bar Graph
sLine Graphs
Pie Charts
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What Data Presentation
will you use for -
Satisfaction SurveysTables
Analysis of Fault CausesBar Charts
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Sales over last 5 yearsLine Chart
Market SharePie Chart
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Remember The calculations required
seem quite complicated. So,
always approach the
questions in a phasedmanner.
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Step 1
Read the question
carefully, and find out
what exactly is asked.
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0
5
10
15
20
25
30
35
40
1st
Qtr
2nd
Qtr
3rd
Qtr
4th
Qtr
East
West
In which
quartersthe
differencebetweenEast and
West isalmost the
same?
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OR
0
5
10
15
20
25
30
35
40
1st
Qtr
2nd
Qtr
3rd
Qtr
4th
Qtr
East
West
In which
quarter the
differencebetween
East andWest is the
most?
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OR
0
5
10
15
20
25
30
35
40
1st
Qtr
2nd
Qtr
3rd
Qtr
4th
Qtr
East
West
In which quarter the
differencebetweenEast andWest is themost
negligible?
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Step 2
Write down the
calculations required in astep-by-step manner.
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0
5
10
15
2025
30
35
40
45
50
1st
Qtr
2nd
Qtr
3rd
Qtr
4th
Qtr
EastWest
North
In which
quarter isthe
differencebetween
East and
West 1/3rdof the total
for North?
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0
5
10
15
2025
30
35
40
45
50
1st
Qtr
2nd
Qtr
3rd
Qtr
4th
Qtr
EastWest
North
OR
In which quarter do
East andWest add
almost upto the total
for North
?
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Find the percentage change
from 126.37 to 188.94
Eliminate the options that
say there has been adecrease
Eliminate the options thatsay there has been an
increase of 100% or more.
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The answer will be around
50%, so select the option +
5% of this.
Most of the times, there will
be only one option in this
range.
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Tables
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DEATHS RATE /
(numbers), 100,0001970 1980 1970 1980
Accide
nt
114,
638
105,
718
56.4 46.7
Motor-vehicle
54,633
53,172
26.9 23.5
Falls 16,
926
13,
294
8.3 5.9
Percentage of people killed in
accidents in 1970 is?
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DEATHS RATE /
(numbers), 100,0001970 1980 1970 1980
Accide
nt
114,
638
105,
718
56.4 46.7
Motor-vehicle
54,633
53,172
26.9 23.5
Falls 16,
926
13,
294
8.3 5.9
56.4 out of 100,000
i.e. 0.0564%
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DEATHS RATE /
(numbers), 100,0001970 1980 1970 1980
Accide
nt
114,
638
105,
718
56.4 46.7
Motor-vehicle
54,633
53,172
26.9 23.5
Falls 16,
926
13,
294
8.3 5.9
% change in falls between
1970 and 1980?
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DEATHS RATE /
(numbers), 100,0001970 1980 1970 1980
Accide
nt
114,
638
105,
718
56.4 46.7
Motor-vehicle
54,633
53,172
26.9 23.5
Falls 16,
926
13,
294
8.3 5.9
Approximately 17K to 13K,
which is close to 25%
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DEATHS RATE /
(numbers), 100,0001970 1980 1970 1980
Accide
nt
114,
638
105,
718
56.4 46.7
Motor-vehicle
54,633
53,172
26.9 23.5
Falls 16,
926
13,
294
8.3 5.9
What was the population in
1980?
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DEATHS RATE /
(numbers), 100,0001970 1980 1970 1980
Accide
nt
114,
638
105,
718
56.4 46.7
Motor-vehicle
54,633
53,172
26.9 23.5
Falls 16,
926
13,
294
8.3 5.9
46.7 out of 100,000,
105,718 out of ------ (200 m)
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Bar Charts
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W
p p p ?
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40 out of 100,000
Hence 400 out of 1 million
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Average annual % increase
between 1970 and 1980?
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Increase of 50% in 10 years,
hence 5% annual.
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Cumulative Bar
Charts
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% of f arm m/c sold in 85 that
were 2W tractors?
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Approximately 70%
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Total sales of combines in
all years?
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Approximately 50 thousand
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Pie Charts
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How many disabled people
in 1989?
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% change in sur vivors to
disabled ratio 70 to 89?
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Line Graphs
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What product was 400%
more thanp
ly
in 80?
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Increase in total
consump
tionf rom 70 & 85
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Average of Lumber between
70 and 85?
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When was the highest %
increase in lumber ?