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By using the free trial software, you agree to use it for evaluation purposes only. It is not to be used for actual research, study planning, or otherwise, whether academic, commercial, government or education.

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Free Trial

The PASS 2020 free trial gives you an opportunity to evaluate the software (with a restriction on alpha) before you purchase it.

When you click the download button with a valid email address, you can begin downloading the PASS 2020 sample size software setup file.

You will receive an email with your trial license key that allows you to evaluate the software for 30 days. If you choose to purchase the software, you can use the license key you receive to convert the trial version into the fully-functional version. You will not need to reinstall PASS 2020 sample size software after you purchase a license.

We’ll periodically send you emails with product information and tutorials to get you started. You can unsubscribe at any time. Your email address will never be sold or given to a 3rd party.

PASS 2020 is compatible with Windows only. Click here for a complete list of system requirements.

A Windows emulator (such as Parallels) is required to use PASS 2020 on a Mac. Click here for more information.

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"I purchased NCSS last week and have been extremely impressed with the product so far. The documentation is superb... Especially strong is the importing of files from Excel and other statistics programs..."

Gary Brager, Baltimore County Public Schools

I have used several statistics tools, but NCSS is the best statistics tool. It is easy to use because the interface and menu are easy to be used. And NCSS is very useful to support an analysis [in] data research.

Evi Triandini, Researcher