1.
Home Page
Fig.
1: Home Page
i) About SSDA 2.0
This link provides brief information about SSDA 2.0.
ii)
Survey Data Analysis
The concept of survey
data analysis has been described in this section. People can have an idea about
sampling methodology by clicking on this link.
iii)
Contact Us
This link shows contact information of the persons associated with this project.
The detailed information can be also be viewed by clicking on their names. A
user login is required to view the detailed profile
2. SSDA2.0
This is the section where most of the links have been provided for carrying out
the survey data analysis. The links provided under this heading includes file
management (My folder, upload, download, delete a data file), extracting large
sample survey data (includes data extraction program from collected data by
National Sample Survey Organization), data imputation to filling the gaps in the
collected data, data analysis and results
For carrying out
the analysis process a user registration is mandatory. User registration can be
done by clicking on the “New User Sign Up” link given on the home page. After
registration, the user is verified by the webmaster and if approved, an email is
sent to informing about it.
To start using the software SSDA2.0, user logs in to the system as given below:
1.
Enter login ID
2.
Enter Password
Click on “Sign
in” button. For new user, click on “New User Sign Up” (Fig. 2)
Fig. 2
After login, you can start using SSDA2.0 for analyzing your survey data. The
available functions displayed on left side of home page (Fig. 3) can be utilized
for this.
Fig. 3
i)
How to Upload a File
1.
Click on “Upload File” option given on the left side. A dialogue box will appear
(Fig. 4). It allows uploading file extensions “.txt”
(text file) or “.xls” or “.xlsx” (MS Excel File) only.
Fig. 4
2.
Click on “Browse” button.
3.
Select
file.
4.
Click on “Upload File” button
Uploaded file will be saved in user’s folder (My Folder).
ii) How to Download a File
1.
Click on “Download File” option given on left hand side of the browser.
2.
Select the file.
3.
Click on “Download” button.
4.
Either open or save the file.
Fig. 5
iii)
How to Delete a File
1. To delete a
file from your folder, click on “Delete File” option given on left side bar.
2. Select the
file.
3. Click on
“Confirm Delete” button.
Fig. 6
iv)
My Folder
“My Folder” shows all files saved in user’s folder (Fig. 7).
v)
Extract NSSO Data
It is basically a web solution created in order to cater to the need of
converting data collected by National Sample Survey Organization. This data is
in ASCII format with meta data for defining entries in it. The data conversion
needs to be done for doing the analysis. This link does the conversion of NSSO
data to a format which can be utilized for doing the analysis available in
SSDA2.0.
This web solution not only helps in reading up these files but also help in
performing search in it.
To start with the web application steps are as follows:
1.
First browse the text file on which you need to do the processing, specify the
number of rows to be shown on the screen and click Upload. The uploaded file
contents will be displayed in the area provided (Fig. 8).
Fig. 8
2.
Now to enter the variable information, select either online method or
File Method.
a.
Select the Online method to define variables as per requirement. (Fig. 9)
i.
Enter the Number of variable you want to define.
ii.
Var. ID – Default, it’s Var1, Var2 etc. upto the number of variables
defined.
iii.
Variable Name - Default is Var1...but user can rename it.
iv.
Datatype - Drop downlist of datatype as Long Integer, Long Double and
Text.
v.
Decimal Position - Default disabled, Enabled only when datatype choosen
is Double.
vi.
Position To - Starting position of the Variable in the data file.
vii.
Length - Length of the variable in the data file.
Please click on “Next” button in case variable declaration number is greater
than 1 otherwise click on “Finish”.
Fig. 9
b.
If you have the variables defined in the Excel sheet then select the File
option with the specify file format that must contain the columns namely
Variable ID, Variable Name, Starting Position and Length. (Fig. 10)
i.
Browse the Excel file of specified format from a location.
ii.
Select the Default data type for all the variables in the list.
iii.
Click on Show button to display the variables list in the grid same as in
case from online submission. Any changes regarding Variable Name, Data type,
Position, Length and Decimal value can be edited here. [The column names in the
excel sheet must not contain comma(,)]
Fig. 10
3.
Click on Show
Result button in order to display the Exact searched data in the area provided.
Fig. 11
4.
Finally
click on the Upload into Excel to upload the searched data into the excel sheet.
vi)
Summary Statistics
1.
On clicking “Summary Statistics”, folder containing uploaded files will
appear on screen.
2.
Select file.
3.
Click on buttons shown as per requirement then click “Show Details”.
4.
Click “Data Scrutiny & Editing” if required otherwise click “Summary
Statistics”.
Fig. 12
5.
Click on Download to MS-Excel to upload the results. (Fig. 13)
Fig. 13
vii) Data Scrutiny and Editing
1.
Click “Data Scrutiny and Editing” given in left side bar.
2.
Select file.
3.
Click Edit, make corrections, click Update (Fig. 14).
4.
Then click on “Edit Records” button right side.
Fig. 14
viii)
Data Imputation
1. Click
“Data Imputation” given in left side bar.
2. Select
“Stratum present”, “number of stages”, “which column” and Stage I, II, III
according to the entry made in “number of stages”. (Fig. 15)
3. Select
“Method of Imputation”.
4. Click
“Yes” for “Sampling Parameter Selection Done” after selection is completed
at steps 2 and 3.
5. Select
variables from the box showing list of variables under “Available Variables”
box.
6. Click
Proceed (Imputation) button.
Fig. 15
ix)
Data Analysis
1.
After login go to “My Folder” and click on the input data file.
2.
Click on “Data Analysis” link given in left side bar.
3.
The analysis work is done in three steps as stated below:
Data Analysis
(Step I)
1. If the input
is a stratified data, Select “Yes” in the “Stratum present”.
2. The input
data can have many stages. Select “number of stages” as “1”, “2” or “3”
according to the input data you selected. Please select the column names
of the stages accordingly.
3.
Click “Yes” for “Sampling Parameter Selection Done” after selection is
completed at step 2.
4.
Select variables from the box showing list of variables under
“Available Variables” box for which the analysis will be carried out.
5.
Click Proceed button.
6.
In the Sample Selection Parameters box, samples selected at different stages
can be viewed.
7.
Before clicking on “Proceed to Next Step (ii)” button, user has to
click on “Download to MS-Excel” button and to save the file.
8.
Open the downloaded excel file. User has to add a new column to enter
the figures regarding the population sizes of respective stratum or stages.
9.
Click on “Proceed to Next Step (ii)” button. (Fig. 16)
Fig. 16
Data Analysis (Step II)
1.
First bar displays the information regarding selection done at Data
Analysis (Step I).
2.
Click on the fields regarding Population Sizes viz. select file name
for population values, etc.
3.
Click Probability Selection,
i)
if equal probability is selected, then click method of selection at
different stages (Fig. 17).
ii)
if unequal probability is selected, then click on respective fields
provided (Fig. 18).
4.
Finally click on “Proceed for Analysis” button.
Fig. 17
Fig. 18
Analysis Results
All the selections done by user at earlier stages of Data Analysis can be
viewed. To correct, user can click on Back button and make selections.
Click any one or all the three radio button “Ratio Estimates”, Sub Population,
Domain if required before clicking the Result button.
Finally click on “Click for Results” button and can save in Ms-Excel files.
