Archives with SDA

     This section describes Overview Figure, Terms, formats, and statistical vocabulary, Search and finding a dataset, Accessing Data, Downloading, Analyzing data using SDA web statistical software.

• Go to http://uc.utcc.ac.th/uc_archives
• Move a pointer to "Archive" and click "Dataset"
   

Unregistered user need to create a new account. The University of Chicago - UTCC Research Center requires user to provide information and e-mail before granting authorization to use its online facilities.

•  
• Click "Create new account"

Fill in on-line application
Click "Register" to complete the registration form

Browse & Search
Users are able to browse or search existing datasets. Our features include

• Browse by Category -- display dataset by Principal Investigator
• Browse by Alphabetically . display dataset by sort alphabets
• Search Archive -- search dataset by keyword in several field

For Example we choose "Browse by Category" and select "the Labor Force Survey (LFS) 2005 (Quarter 4)".

• Click title name "Labor Force Survey 2005 (Quarter 4)"

Feature UC-UTCC Archives with SDA

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• Metadata Dataset
• Bibliographic Description
• Scope of Study
• Methodology
• Access and Availability

• Analyze & Subset

• Full DDI Codebook

Access for UC-UTCC Archives with SDA

• Click menu "Analyze & Subset"

• Click on the link(s) below to begin using SDA at center page

• It shows SDA Front Page

Example Analyze Dataset
Frequency Distributions

     A frequency distribution is a count of the number of cases that take on each value of a variable A univariate frequency distribution table summarizes the categorical information for a single variable, while a cross tabulation (which is covered in the next section) presents categorical info on two variables. Measures of central tendency (mean, mode, median) are based on frequency distributions.

Sample

     We will use the Labor Force Survey (LFS) 2005 (Quarter 4) to illustrate how to calculate a variable.s frequency distribution for an entire survey sample.

• Click the "Analyze & Subset" link menu on the We will calculate the frequency distribution for the variable, work during the survey week
• In the "Variable Selection" tool, double click on the "PART III Employment" variables heading
• Double click on the variable "WRKLSTWK - WORK DURING THE SURVEY WEEK".
• The variable name will appear in the "Selected" box at the top of the page.
• Select the "Row" button next to "Copy to" in order to copy the variable name into the SDA Frequencies/Crosstabulation Program.
• Ensure that in the "Weight" box "WEIGHT" - Weight Variable" is selected. The default in the UTCC Data Archive service is to produce weighted frequencies. If you do not use the sample weights, then you will be reporting characteristics of the sample. These characteristics cannot be used to infer to the underlying population. Note: the frequencies distributions displayed in the Codebook are for the unweighted variables.

Click the "Run the Table" button.

The following frequency distribution table will appear:

Notice that the range of variable values displayed is 1-2. If you want to also display missing data:

• Ensure that you select .Include missing-data values. in the table options box of the SDA Frequencies/Crosstabulations program prior to running the table.

The following frequency distribution table will appear: