Mstat Software

Mstat was developed to help students analyze their data using nonparametric statistical methods. This program grew out of a graduate course, "Statistical Problems in Genetics and Molecular Biology," taught by the Department of Oncology at the University of Wisconsin-Madison over the last 30 years.

This site will have the latest version of the Mstat software package for Windows, Macintosh OSX, and Linux, available from the Download link above. Help for using Mstat is also available.

As in the past, the help files include a copy of the notes for the "Statistical Problems …" course mentioned above. These course notes have been made into a book. Both paperback and ebook versions are available, as detailed on the Help page.

macOS Sierra issues

The new version of macOS (OSX), Sierra (10.12), includes more stringent security for downloaded applications. A new version of the Mstat 6.2 installer for 64-bit Macs is available as of 10/7/2016. This version has a signature that allows it to be installed on macOS Sierra. As before, you will need to right-click on the Mstat icon and choose Open when you run the program for the first time.

Mstat 6.2.2 released February 15, 2017

A bug that caused a one-sided Barnard's test to fail on larger tables has been fixed.

Mstat 6.2.1 released July 13, 2016

Most of the changes in this major new release are under the hood. The Qt toolkit used for the user interface has been updated to version 5.4.2 for Windows and OSX, and the underlying J engine is now version 8.04. The biggest functional change is greatly improved handling of Unicode for imported text. Importing text data into Mstat now allows UTF-8, UTF-16, or ANSI encoded character data. As a result, indicator data imported from spreadsheets or text files can now include characters with diacritical marks, such as Å, á, or ü. A number of minor improvements have also been made, including optional wrapping of text in the main window, import and export toolbar buttons, and the ability to provide a prefix for all variable names imported from csv or tab-delimited files. See the help file for further details.

Finally, the evolving OSX ecosystem has been taken into account with this release. Nearly all Mac users (OSX 10.7 and later) should download the 64-bit (x64) version of Mstat. For the few users still working with OSX Snowleopard (about 3% of OSX users according to the latest market share data), a 32-bit (x86) version is also available. Support for the PowerPC architecture has been dropped for this release, though a legacy PPC version of Mstat 6.1.4 is still available on the Download page.

Mstat 6.1.4 released June 5, 2014

Fixed a problem in the Which test? dialog. Yet another quotes in listbox issue. You should be able to install using the Help > Check for updates menu choice.

Mstat 6.1.3 released May 9, 2014

Further fixes to eliminate the quotes in listbox problem first seen in the Import data function. You should be able to install using the Help > Check for updates menu choice.

Mstat 6.1.2 released May 5, 2014

Fix regression in File > Import data function. New installers are available on the Download page. Alternatively, if you've already installed 6.1.1, choose Check for updates from the Help menu to install.

Mstat 6.1.1 released May 2, 2014

Several minor fixes to Mstat, including a bug in the Which test? dialog, extending the Edit dialog to allow use of J notation when editing the contents of a variable, showing the number of bootstrap trials when estimating median survival by Kaplan-Meier, and a bug when installing Mstat on some non-English language Windows. A fresh install is required for this release because of problems updating the program using the Help > Check for updates function related to moving the Mstat website to a new server and an issue when installing to a protected directory (e.g., "Program Files") on Windows.