analyse the data

8/13/2019 Analyse the Data

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Analysis is based on the questions forwhich the data is expected to provideanswers

Analyzethe Data!

Some questions Identify how many are interested in the

new scheme and how many are either

indifferent or not interested Cross tabulate them along Gender, Age,

Education, marital status etc Is there any relationship between the

income level and the type of response? Identify the factors influencing the

adoption to new scheme?

What else the data speaks!


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Data Entry -The First Step

Analysis with Software The Second Step


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The data collected from the field containsfilled-in questionnaires or sheets

Each sheet must have a serial number The sheets should be converted into a data

file for use in computer We can probably divide the work and make

more than one file and assign the work toData Entry Operators

The Data Entry Design should be well planned and be common for all operators

These data files can be pooled up ifnecessary to make a project-data-file

The

physicalstructureof data


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There are many packages for data entrylike..

FoxPro Lotus MS-Excel MS-Access

Oracle On-line formats

Softwarefor data

entry anddata

analysis Packages for Statistical Analysis

SPSS SAS MINITAB SYSTAT


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A VISIT TO EXCEL


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MAKING ADATA FILE

Open ExcelOn the title bar of the Excel window

the file name appears as MicrosoftExcel Book1

It usually contains three sheetsnamed Sheet1,Sheet2 and Sheet3

In Sheet1 start entering the datafrom cell A1Reserve the f i r s t r o w for column

headings like Sno, Age, Gender etc

Key in the data row wise or columnwise (press ENTER key after eachentry)

Save the file with a suitable name ina Folder meant for this project


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A SAMPLEDATA SHEET

File Name: Food Folder: D:\Statman


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NOT THE

CORREC

T STYLE

OF DATA

ENTRY


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THE RIGHTWAY!


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DATA SHEET OF HEALTH INSURANCE


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ANALYTIC

AL

FEATURE

S

IN EXCEL

Finding sums

Data sorting and Filtering

Making one dimension tables

Cross tabulations

Creating different types of graphs

Making abstracts from worksheets

Changing the styles of presenting data

Linking Excel report to a document


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SOME

TIPS

INDATA

HANDLIN

G

Selecting a part of data

Sorting

Filtering

Column width

Cut, Copy & Paste

Auto Fill

Paste Special

Freeze PanesExporting Excel data to Word


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D T

N LYSIS

P K

A free package of simple statistical tools is available in Excel

It is called Data Analysis Pak

It provides for analyses likeSummary statisticsComparison of groupsCorrelationsRegression analysisStatistical tests of hypothesis

..and many more


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DataPrepared

InWord

Table

S NO NAME GENDER CAS TE ENGLIS H MATHS S CIENCE

1 RAJA. M B SC 60 27 45

2 ANITHA. R G SC 55 44 36

3 NEELIMA. K G ST 46 54 654 SIVARAJAN. A B OC 35 47 28

5 MUTHU. B G OC 20 46 35

6 GOPAL.R B OC 54 50 45

7 BEENA. A G BC 63 46 64

8 ACHUTAN. S B BC 54 52 65

9 PRADEEP.M B BC 35 40 54

10 PERUMAL. S B OC 25 36 45

11 VARADAN. D B OC 28 40 38

12 DIVYA. T G BC 64 56 37

13 VASUMATHI. D G BC 37 45 54

14 ANDAL. B B SC 63 44 36

15 JAYA. L G ST 56 52 63

16 RAMAN. N B BC 45 48 54

17 MUREGESH. M B ST 50 46 68

18 GANESH. L B ST 35 38 65

19 SASIKALA. R G BC 52 50 54

20 VALLI. M G SC 41 55 58

It is enough to copy the Word Table andPaste in Excel!


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We havegot it

in Excel!


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Can wemake

a table of

counts(frequencies)from this

data?

SoftSkill

WHY NOT ?USE

PIVOT TABLESOPTION


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MakeFrequency

Tables!

You can make one-way and two-way frequency tables fromExcel sheet

Use Data menu and select the Pivot Table and Chart submenu

Follow the Wizard steps

You will get the required tables

Skill


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Frequency distribution of studentsby caste (one-way table)

Count of SNOCASTE Total

BC 7OC 5SC 4

ST 4Grand Total 20


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Frequency distribution of studentsby Caste and Gender (two-way table)

Count of SNO GENDERCASTE B G Grand Total

BC 3 4 7

OC 4 1 5SC 2 2 4

ST 2 2 4

Grand Total 11 9 20

Can we do this with hand calculations ifthere are thousands of cases?

Not impossible but difficult to do!


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Can wemake a

Frequencytable withgiven class

intervals?

SoftSkill

USESTATISTICALFUNCTIONS

CERTAINLY !


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Built-inFunctionsIn Excel

ENGINEERING FUNCTIONS


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Built-inFunctionsIn Excel

STATISTICAL FUNCTIONS


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AQUIRESKILL

BYDOING

DEMO FOLLOWS..


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Making a Frequency TableBody length (cm) of 120 fish

16.7 12.6 15.1 13.4 16.7 17.7 14.6 18.0 15.8 14.816.9 13.7 16.0 14.4 15.3 16.4 12.8 11.5 13.4 16.014.3 18.3 18.3 16.6 13.2 17.5 16.9 15.2 14.0 17.713.8 13.2 13.7 18.4 17.1 13.9 20.5 13.2 14.9 17.416.9 15.0 17.2 14.5 13.6 16.6 13.0 17.9 18.8 17.915.3 18.9 14.8 16.0 18.5 13.3 19.2 16.2 14.4 17.815.6 18.0 15.8 15.7 20.6 13.5 16.3 15.1 14.3 10.715.6 15.4 12.6 15.4 17.2 15.1 14.1 13.1 15.4 13.512.7 14.1 12.2 16.6 17.0 15.6 14.7 18.7 18.3 13.219.5 14.3 16.2 15.9 16.8 15.3 17.3 13.1 12.3 17.016.9 12.4 15.4 17.6 16.2 14.4 18.8 13.5 14.2 14.812.9 13.5 15.1 14.2 15.3 14.8 15.2 14.4 16.1 18.2

Prepare a frequency table using Excel


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We use

the PastefunctionFREQUENCY

min 10.7max 20.6range 9.9

interval 2lower limit upper limit upper bound (BIN) freq

10 12.0 11.9 212 14.0 13.9 2614 16.0 15.9 43

16 18.0 17.9 3118 20.0 19.9 1620 22.0 21.9 2

Class freq10 - 12 2

12 - 14 2614 -16 4316 - 18 3118 - 20 1620 - 22 2

120

Learnmore by

Do it yourself


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You canalso

constructa

Bar Chart

Class freq10 - 12 212 - 14 2614 -16 4316 - 18 3118 - 20 1620 - 22 2TOTAL 120


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ADVANCED FEATURES


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DataAnalysis

Pak


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DataAnalysis

Pak


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Thet-test

Sugali Yanadi20.43 17.7

22.51 21.4

18.99 20.7

20.49 19.3

23.12 21

25.63 17.9

18.08 18.6

20.63 18.5

22.55 18.2

22.43 20.3

22.77

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Body Mass Index ofTribal Groups

Is the Average BMISame for the two

groups ?


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t-testoutput

Sugali YanadiMean 21.73833 19.36Variance 4.319215 1.898222Observations 12 10

Pooled Variance 3.229768Hypothesized Mean Difference 0df 20t Stat 3.090767P(T


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p-p Plot


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WIDE RANGE OF APPLICATIONS

Control chartsForecasting

Curve fitting

Solver for optimization

College Admissions

Evaluation of test scores & ranking

and many more!


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The best way of learningExcel is to work with Excel


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Statistics Made Simple -Do it yourself on PC

ByK.V.S.Sarma

Prentice Hall India


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Thank you

analyse the data

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