soft data to analyse

7/27/2019 Soft Data to Analyse

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There are many packages for data entry

like..

FoxPro Lotus

MS-Excel

MS-Access

Oracle On-line formats

Software

for data

entry and

data

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 Excel

On the title bar of the Excel windowthe file name appears as MicrosoftExcel Book1

It usually contains three sheetsnamed Sheet1,Sheet2 and Sheet3

In Sheet1 start entering the datafrom cell A1

Reserve the f i rst rowfor columnheadings 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 in

a Folder meant for this project


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A SAMPLE

DATA 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 Panes

Exporting Excel data to Word


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D T

N LYSISP K

A free package of simple statistical tools is available in Excel

It is called Data Analysis Pak

It provides for analyses like

Summary statistics

Comparison of groups

Correlations

Regression analysis

Statistical tests of hypothesis

..and many more


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Data

Prepared

In

Word

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 65

4 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 and

Paste in Excel!


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We have

got it

in Excel!


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Can we

make

a table of

counts(frequencies)

from this

data?

Soft

Skill

WHY NOT ?

USE

PIVOT TABLESOPTION


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Make

Frequency

Tables!

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

Use Data menu and select the Pivot Table and Chartsub

menu

Follow the Wizard steps

You will get the required tables

Skill


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Frequency distribution of students

by caste (one-way table)

Count of SNO

CASTE Total

BC 7OC 5

SC 4

ST 4Grand Total 20

i i i f


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Frequency distribution of students

by Caste and Gender (two-way table)

Count of SNO GENDER

CASTE 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 if

there are thousands of cases?

Not impossible but difficult to do!


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Can wemake a

Frequency

table withgiven class

intervals?

Soft

Skill

USE

STATISTICAL

FUNCTIONS

CERTAINLY !


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Built-in

Functions

In Excel

ENGINEERING FUNCTIONS


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Built-in

Functions

In Excel

STATISTICAL FUNCTIONS


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AQUIRE

SKILL

BY

DOING

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 14.8

16.9 13.7 16.0 14.4 15.3 16.4 12.8 11.5 13.4 16.0

14.3 18.3 18.3 16.6 13.2 17.5 16.9 15.2 14.0 17.7

13.8 13.2 13.7 18.4 17.1 13.9 20.5 13.2 14.9 17.4

16.9 15.0 17.2 14.5 13.6 16.6 13.0 17.9 18.8 17.9

15.3 18.9 14.8 16.0 18.5 13.3 19.2 16.2 14.4 17.8

15.6 18.0 15.8 15.7 20.6 13.5 16.3 15.1 14.3 10.7

15.6 15.4 12.6 15.4 17.2 15.1 14.1 13.1 15.4 13.5

12.7 14.1 12.2 16.6 17.0 15.6 14.7 18.7 18.3 13.2

19.5 14.3 16.2 15.9 16.8 15.3 17.3 13.1 12.3 17.0

16.9 12.4 15.4 17.6 16.2 14.4 18.8 13.5 14.2 14.8

12.9 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 10.7

max 20.6

range 9.9

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

10 12.0 11.9 2

12 14.0 13.9 26

14 16.0 15.9 43

16 18.0 17.9 3118 20.0 19.9 16

20 22.0 21.9 2

Class freq

10 - 12 2

12 - 14 2614 -16 43

16 - 18 31

18 - 20 16

20 - 22 2

120

Learn

more by

Do it yourself


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You can

also

construct

a

Bar Chart

Class freq

10 - 12 2

12 - 14 26

14 -16 43

16 - 18 31

18 - 20 16

20 - 22 2

TOTAL 120


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ADVANCED FEATURES


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Data

Analysis

Pak


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Data

Analysis

Pak


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Thet-test

Sugali Yanadi

20.43 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 of

Tribal Groups

Is the Average BMI

Same for the two

groups ?


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t-testoutput

Sugali YanadiMean 21.73833 19.36

Variance 4.319215 1.898222

Observations 12 10

Pooled Variance 3.229768Hypothesized Mean Difference 0

df 20

t Stat 3.090767

P(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 learning

Excel is to work with Excel


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Statistics Made Simple -

Do it yourself on PC

By

K.V.S.Sarma

Prentice Hall India


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Thank you

soft data to analyse

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