Download or register DiffTest
From this page you can download a fully-working, permanent copy of DiffTest which can be used indefinitely without charge. It is limited in only two ways:
After about five minutes use it has to be restarted.
It cannot print out its results.
These limitations do not apply to DiffTest Pro. You can register DiffTest to convert it to DiffTest Pro at any time.
Page contents
Introduction to Statistics — the friendliest foundation course ever!
System requirements
DiffTest should run on any computer with a 32-bit Microsoft Windows operating system such as Windows 95, Windows 98, Windows 2000, Windows XP or Windows NT, but has not been tested under all the possible configurations.
Download
Version 2.00 of DiffTest (convertible to DiffTest Pro) can be downloaded here.
If you have a utility such as Winzip for decompressing ZIP files, click to download dt_setup.zip (800 kB).
If not, click to download dt_setup.exe (837 kB). This is a self-extracting zip file that may not work correctly with every operating system.
If neither method works, send e-mail to request the uncompressed setup files as an e-mail attachment. This will only work if your mail system permits executable attachments (and some do not).
Optionally,
click to download the DiffTest 1.05 manual
(526 kB).
Note:
This manual is for version 1.05 of DiffTest. The information in this
site and the extensive Help
in the latest version make a printed manual largely unnecessary.
To use the DiffTest Manual, you need the Adobe Acrobat Reader. Click here to download it free.
If you experience difficulties in downloading, you may find it useful to install a download manager such as Go!Zilla or GetRight.
Installation
If you have already registered an earlier release, do not uninstall or delete it. The download will overwrite the old files and when installed will operate immediately as DiffTest Pro. If you have uninstalled DiffTest Pro, your previous registration code can be used again. If you have uninstalled it and have lost your original code you can repeat the registration process without charge.
After downloading it, unzip dt_setup.zip or run the distribution file dt_setup.exe. This is a self-extracting archive which unpacks the necessary files into the current folder (though you are given an opportunity to select an alternative if you wish).
Run the extracted installation file, setup.exe. This conducts an installation dialogue allowing you to select various options for your installation.
Once this has been done, the installation files are no longer needed and can safely be deleted. You may wish to retain the self-extracting distribution file dt_setup.exe for future use or to pass on to colleagues.
If you have registered an earlier release of DiffTest on your machine and have not uninstalled it, the new one will function as DiffTest Pro without further action.
Registering DiffTest to create DiffTest Pro
Whenever DiffTest starts, it invites you to register your computer to create DiffTest Pro, using a registration key made up of letters and digits.
If you have no key, DiffTest displays a line of letters and digits. Send it by e-mail to registration@difftest.co.uk and, provided that you have paid the appropriate licence fee, you will be sent a registration key. When it is entered, DiffTest Pro is generated at once.
DiffTest Pro starts immediately and runs for as long as you wish. It also allows you to print out tables of results for future reference.
Current charges for DiffTest Pro
DiffTest can be used indefinitely without charge.
A licence for DiffTest Pro on a single processor used by one person at a time costs 49 UK pounds or 69 US dollars.
A site licence for DiffTest Pro on any number of processors at a single address costs 195.00 UK pounds or 295 US dollars.
A non-profit educational institution can get a site licence at the single-processor charge.
Methods of payment
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