PASS Quick Launch Window

The Quick Launch window contains a button corresponding to each procedure in the system. As you mouse over each button, a brief paragraph explaining the main purpose of the currently selected procedure will appear in the message box to the right. The Quick Launch makes it easy to find and launch any procedure from a single screen. You can also easily customize the Quick-Access button toolbar by dragging and dropping icons from the Map-Quick Launch window.

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Download a 7-day Trial Copy of PASS 11

Use Evaluation Serial Number "TRYPASS11"

Place an Order Using Our Secure Online Order Form

PASS 11
Now Available

We are pleased to announce the availability of PASS 11. This edition adds over 17 new procedures and features to PASS.

Click here for pricing.

Read about what’s new in
PASS 11.

"Researchers seeking software to determine sample size have a wide range of choices... Researchers seeking a comprehensive, commercial program for analysis of statistical power and precision should consider PASS 2008."

- Patrick Dattalo
"A Review of Software for Sample Size Determination"
Eval Health Prof, 2009.

Click here for the complete list of procedures.

Download a
PASS Update

Most Recent Version:
PASS 11
Version 11.0.8
Released December 2, 2011

What problems have been fixed by recent PASS 11 updates?

PASS Training Course

A 4-week, online course on sample size and power, featuring PASS, is now being offered through statistics.com. The course is taught by Dr. Thomas P. Ryan.

Click here for more information.


Minimum System Requirements Click on one of the links below to view the minimum system requirements for NCSS and PASS products: PASS 11 PASS 2008 NCSS 2007 Previous Versions	Accuracy We at NCSS have put a great deal of effort into finding the most accurate algorithms possible. The programs have been tested and verified over and over, both by us and by our customers. Each routine has been verified against textbooks, journal articles, and, where possible, other software. NCSS and PASS are some of the most accurate statistical analysis programs available. NCSS and PASS calculate with seventeen-digit, double-precision accuracy.	Guarantee If you are not completely satisfied with an NCSS product during the first 30 days for any reason, return the program for a full, prompt refund (excluding shipping).

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