VPLX: Variance Estimation for Complex Samples

Windows 3.1 PC Version

This page pertains to a 1995 version for Windows 3.1 and DOS. The PC version requires: 8 Meg of RAM, a bit more than 1 Meg of disk space, DOS 5.0 or higher or Windows 3.1, and a machine with a math coprocessor (486 DX ...), Pentium, or separate coprocessor on 386. The executable has run on at least one non-Intel processor.

The vplx.exe executable was produced by the Microsoft PowerStation 1.0. The executable is a 16-bit application. (The Win 95/98/NT version is a 32-bit application.) Users are not required to have this product in order to run the program, but vplx.exe and other files should be installed according to the directions in revcha1.pdf. This file uses Adobe's Acrobat format, which is described in the section on VPLX documentation.

Contents of the PC directory:

    README       -  A readme file especially for users of anonymous ftp.

    revcha1.pdf -   Documentation for installation of the PC version
                    of VPLX, stored as an Acrobat file (binary).

    examples.zip - Examples and data, including those used in the
                    documentation, in compressed format (binary).

    vplerror.txt - A file containing error messages.

    vplx9507.zip - vplx.exe and related files for version 95.07 (binary)
                    (July, 1995).

[PDF] or PDF denotes a file in Adobe’s Portable Document Format. To view the file, you will need the Adobe® Reader® Off Site available free from Adobe.

These files are compressed. They must be uncompressed before use. For information on uncompressing these files see our Compressed Files page.

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The .zip and .pdf are binary files rather than character files. Mosaic, Netscape and perhaps other browsers recognize the situation and will transfer the files correctly. However, if you copy the files to one machine, e.g, unix, and then transfer them to a pc with ftp, you should use the binary command.

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Source: U.S. Census Bureau  |  Systems Support Division  |  Page Last Modified: May 06, 2011