FAQ

You can be up and running in less than 30 minutes by following the Help System Quick Start. Complete your statistical analysis in less than an hour.

Your questions will be answered by a member of our team of PhD statisticians on our technical support staff. We will answer your telephone questions between 8 a.m. and 5 p.m., Mountain Time. You can also email your questions to support@ncss.com. We will answer your email queries, usually within a few hours.

You can download free trial versions of PASS and NCSS from this website. At any time you can purchase a license key that will convert the free trial to the fully-functioning professional version.

If you are not completely satisfied with one of our products during the first 30 days, you may return the software for a full, prompt refund (excluding shipping).

NCSS has several strengths. It is very easy to learn and use. It has a comprehensive list of available procedures. All calculations are verified and accurate. You can import/export data from about 30 different spreadsheets and databases. Output reports are ready to transfer to your word processor. The price is about half that of the competition. You can have your questions answered by a PhD statistician.

PASS calculates sample size and power for more statistical procedures than any other software package on the market. PASS is easy to use. All calculations are accurate, verified, and validated using published literature with references supplied in the output. Output reports are ready to transfer to your word processor. You can have your questions answered by a PhD statistician.

Our software prices are much lower than those of our main competitors. With NCSS and PASS, you get much, much more for a substantially lower cost. For software pricing, visit our online store or contact us for a custom quote.

NCSS and PASS are very easy to learn and use. The simple user interface, Quick Start document, training videos, and documentation all contribute to a very easy startup experience.

The older spreadsheet (*.s0) and database (*.s0z) file types are no longer used directly by newer versions of NCSS although they can be imported very easily. These have been replaced by the new NCSS Data File (*.NCSS). To import an NCSS .s0 or .s0z file, select File > Import > NCSS 97-2007 Spreadsheet (*.s0) or File > Import > NCSS 97-2007 Database (*.s0z) from the NCSS Data window. Once you have imported your file, save it as an NCSS Data File with extension *.NCSS to take advantage of all the new capabilities of NCSS.

You can associate NCSS with .s0 and .s0z files on your computer so that NCSS opens up automatically ready to import the file when you double click on a file in Windows Explorer. To do this, right click on a spreadsheet (*.s0) or database (*.s0z) file and choose "Open" or "Open With...". In the windows dialog that follows, select the most recent version of NCSS as the program used to open this file type. If asked whether to always open this file type with NCSS, select "Yes". From now on, your current version of NCSS will open when you double click on the file in Windows Explorer.

NCSS 8 introduced a new data file format (*.NCSS) that combines the features of the older spreadsheet (.s0) and database (.s0z) data file types and adds many more features.

The following table shows a comparison of these data file types:

*You will likely exceed the memory capacity on your computer long before you reach this limit. The limit is really defined by the total number of cells. You will probably run into memory issues if the number of cells exceeds 25 million.

Click on one of the links below to view the minimum system requirements for NCSS and PASS products

• PASS 2024
• PASS 2023
• PASS 2022
• PASS 2021
• PASS 2020
• PASS 2019
• PASS 16
• PASS 15
• PASS 14
• PASS 13
• PASS 12
• PASS 11
• PASS 2008

• NCSS 2024
• NCSS 2023
• NCSS 2022
• NCSS 2021
• NCSS 2020
• NCSS 2019
• NCSS 12
• NCSS 11
• NCSS 10
• NCSS 9
• NCSS 8
• NCSS 2007

• Previous Versions

Yes. PASS 2019 or later and NCSS 2019 or later are compatible with Windows 11.

Yes. PASS 13 or later and NCSS 9 or later are compatible with Windows 10.

Yes. PASS 13 or later and NCSS 9 or later are compatible with Windows 8 and Windows 8.1.

PASS 16 or later and NCSS 2019 or later are compatible with Windows Vista with Service Pack 2 or higher. PASS 16 or later and NCSS 2019 or later are not compatible with Windows XP.

PASS 2008 through PASS 15 and NCSS 8 through NCSS 12 are all compatible with Windows 7, Vista, and XP.

Older versions of NCSS and PASS (e.g. PASS 2005, NCSS 2007, NCSS 2004, or earlier) will only run on Windows XP or earlier.

Yes. PASS 2008 or later and NCSS 2007 or later will install and run on 64-bit operating systems.

Older versions of NCSS and PASS (e.g. PASS 2005, NCSS 2004, and earlier) will only run on 32-bit systems.

Yes. We have made every effort to make NCSS and PASS Section 508 Compliant. Click here to read the Section 508 Accessibility Statement and download individual VPAT documents.

Use the following links to access the license agreements:

• NCSS License Agreements
• PASS License Agreements

For now, the only way to use NCSS or PASS on a Mac is with a Windows emulator.

Click here to download updates to PASS.
Click here to download updates to NCSS.

We offer NCSS and PASS to students at reduced prices. Verification of student status is required. Students may purchase NCSS at discounted rates through our student store or through the OnTheHub eStore. Email us for details at sales@ncss.com.

PASS citations should contain the information below. These citations may be adapted as needed to comply with publication format requirements for citations.

PASS 2024 Citation:
"PASS 2024 Power Analysis and Sample Size Software (2024). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 2023 Citation:
"PASS 2023 Power Analysis and Sample Size Software (2023). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 2022 Citation:
"PASS 2022 Power Analysis and Sample Size Software (2022). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 2021 Citation:
"PASS 2021 Power Analysis and Sample Size Software (2021). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 2020 Citation:
"PASS 2020 Power Analysis and Sample Size Software (2020). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 2019 Citation:
"PASS 2019 Power Analysis and Sample Size Software (2019). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 16 Citation:
"PASS 16 Power Analysis and Sample Size Software (2018). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 15 Citation:
"PASS 15 Power Analysis and Sample Size Software (2017). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 14 Citation:
"PASS 14 Power Analysis and Sample Size Software (2015). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 13 Citation:
"PASS 13 Power Analysis and Sample Size Software (2014). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/pass."

PASS 12 Citation:
"Hintze, J. (2013). PASS 12. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

PASS 11 Citation:
"Hintze, J. (2011). PASS 11. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

PASS 2008 Citation:
"Hintze, J. (2008). PASS 2008. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

PASS 2005 Citation:
"Hintze, J. (2005). PASS 2005. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

PASS 2002 Citation:
"Hintze, J. (2002). PASS 2002. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

PASS 2000 Citation:
"Hintze, J. (2000). PASS 2000. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

NCSS citations should contain the information below. These citations may be adapted as needed to comply with publication format requirements for citations.

NCSS 2024 Citation:
"NCSS 2024 Statistical Software (2024). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 2023 Citation:
"NCSS 2023 Statistical Software (2023). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 2022 Citation:
"NCSS 2022 Statistical Software (2022). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 2021 Citation:
"NCSS 2021 Statistical Software (2021). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 2020 Citation:
"NCSS 2020 Statistical Software (2020). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 2019 Citation:
"NCSS 2019 Statistical Software (2019). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 12 Citation:
"NCSS 12 Statistical Software (2018). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 11 Citation:
"NCSS 11 Statistical Software (2016). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 10 Citation:
"NCSS 10 Statistical Software (2015). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 9 Citation:
"NCSS 9 Statistical Software (2013). NCSS, LLC. Kaysville, Utah, USA, ncss.com/software/ncss."

NCSS 8 Citation:
"Hintze, J. (2012). NCSS 8. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

NCSS 2007 Citation:
"Hintze, J. (2007). NCSS 2007. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

GESS 2006 Citation:
"Hintze, J. (2006). GESS 2006. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

NCSS 2004 Citation:
"Hintze, J. (2004). NCSS 2004. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

NCSS 2001 Citation:
"Hintze, J. (2001). NCSS 2001. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

NCSS 2000 Citation:
"Hintze, J. (2000). NCSS 2000. NCSS, LLC. Kaysville, Utah, USA. www.ncss.com."

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Basic training for use of NCSS or PASS can be obtained by watching the free training videos, available through this website.