ProductsPASS 13ProceduresVideosUpgradeDownloadsFree TrialPASS DocumentationSystem RequirementsRecent PublicationsCustomer SatisfactionNCSS 10ProceduresVideosUpgradeDownloadsFree TrialNCSS DocumentationEducationAcademic InstitutionsSystem RequirementsRecent PublicationsCustomer SatisfactionStoreOnline StorePrice ListOrder FormsMy AccountSupportSupportDownloadsFAQTrainingVideosPASS 13Product InformationTrainingNCSS 10Product InformationTrainingCompanyAbout UsContact UsAlready Registered?   Login to view past orders.div.slide" data-cycle-pause-on-hover="true">Sample Size SoftwarePASS is the world-wide leading software tool for determining sample size. As the leader in sample size technology, PASS performs power analysis and calculates sample sizes for over 650 statistical test and confidence interval scenarios.Learn MoreBuy NowStatistical Analysis & Graphics SoftwareNCSS software provides a complete, easy-to-use collection of hundreds of statistical and graphics tools to analyze and visualize your data. NCSS is accurate, comprehensive, intuitive, and well-documented.Learn MoreBuy NowPASS13 Sample Size Software
NCSS10 Statistical Analysis & Graphics Software
Statistical, Graphics, and Sample Size SoftwareFor over 30 years, we at NCSS have been dedicated to providing researchers, investigators, academics, scientists, and other professionals with quality statistical software that is comprehensive and accurate, but still intuitive and easy to use.Our two products, NCSS and PASS, are used world-wide by researchers in many industries. They are used by individual professionals and academics, as well as in collaborative efforts within large institutions.
All software purchases from NCSS come with full PhD statistician support, by phone or by email. Also, free training videos are available through this website.Each procedure is carefully documented with technical details, examples, annotated output, references, formulas, and other details. The documentation can be viewed on this website, or through the help system that is integrated into the software.To get to know NCSS and PASS, you can watch our product features or demonstration videos, download a trial of the software, or read more about each product on this site. We sincerely feel that these tools will quickly give you your needed answers simply and accurately.
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PASS13: PASS (Power Analysis and Sample Size) is the premier software tool for determining the needed sample size or analyzing the power of a study. PASS is used extensively in clinical trial planning, grant proposals, pharmaceutical research, statistical and biostatistical consulting, health research, and many other areas of study planning and study evaluation.Each 'procedure' in PASS corresponds to a specific statistical test or confidence interval. To use PASS, the investigator need only open the desired procedure, specify a handful of necessary parameters, and run the procedure. Carefully crafted option notes guide the us