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8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 1/43
Data Interpretation
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 2/43
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.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 3/43
This is the ³Reading
Comprehension´ inmathematics. The information
is available for the reference,you are supposed to ³read´
(interpret) it to answer th
equestions.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 4/43
Preparation
The ³mathematics´ required
for DI is mostly addition,subtraction, division and
multiplication. Quite a few of
the questions focus on
percentage.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 5/43
Types of DataPresentation
Tables
Bar Graph
sLine Graphs
Pie Charts
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 6/43
What Data Presentation
will you use for -
Satisfaction SurveysTables
Analysis of Fault CausesBar Charts
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 7/43
Sales over last 5 yearsLine Chart
Market SharePie Chart
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 8/43
Remember The calculations required
seem quite complicated. So,
always approach the
questions in a phasedmanner.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 9/43
Step 1
Read the question
carefully, and find out
what exactly is asked.
8/8/2019 Data ion Introduction (Alpha)
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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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 11/43
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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 12/43
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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 13/43
Step 2
Write down the
calculations required in astep-by-step manner.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 14/43
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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 15/43
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
?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 16/43
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 17/43
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.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 18/43
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.
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 19/43
Tables
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 20/43
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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 21/43
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%
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 22/43
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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 23/43
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%
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 24/43
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?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 25/43
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)
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 26/43
Bar Charts
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 27/43
W
p p p ?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 28/43
40 out of 100,000
Hence 400 out of 1 million
8/8/2019 Data ion Introduction (Alpha)
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Average annual % increase
between 1970 and 1980?
8/8/2019 Data ion Introduction (Alpha)
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Increase of 50% in 10 years,
hence 5% annual.
8/8/2019 Data ion Introduction (Alpha)
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Cumulative Bar
Charts
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 32/43
% of f arm m/c sold in 85 that
were 2W tractors?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 33/43
Approximately 70%
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 34/43
Total sales of combines in
all years?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 35/43
Approximately 50 thousand
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 36/43
Pie Charts
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 37/43
How many disabled people
in 1989?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 38/43
% change in sur vivors to
disabled ratio 70 to 89?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 39/43
Line Graphs
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 40/43
What product was 400%
more thanp
ly
in 80?
8/8/2019 Data ion Introduction (Alpha)
http://slidepdf.com/reader/full/data-ion-introduction-alpha 41/43
Increase in total
consump
tionf rom 70 & 85
8/8/2019 Data ion Introduction (Alpha)
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Average of Lumber between
70 and 85?