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statistical software sample size software ncss sample size pass pass 2026 procedures info videos what s new in pass 2026 free trial pass documentation system requirements publications citing pass customer satisfaction order data analysis ncss ncss 2026 procedures info videos plot capabilities what s new in ncss 2026 free trial ncss documentation academic institutions system requirements publications citing ncss customer satisfaction order free trials pass 2026 sample size ncss 2026 data analysis industries medical research academia business research quality control mass appraisal classroom support center support faq contact us on a mac about us pass videos pass training videos pass downloads updates pass system requirements pass documentation pass license agreements ncss videos ncss training videos ncss downloads updates ncss system requirements ncss documentation ncss license agreements online store online store student store custom payment price lists my account my account sample size software pass 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 1200 statistical test and confidence interval scenarios learn more buy now statistical analysis graphics software ncss 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 more buy now medical research academia business research quality control mass appraisal classroom statistical graphics and sample size software for over 30 years ncss llc has 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 solutions ncss and pass are used world wide by researchers in many industries and are renowned for accuracy ease of use graphical excellence and affordability these statistical programs are used by thousands of customers including 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 learn more about ncss and pass you can watch our product features or demo videos download a trial of the software or read more about each product on this site learn more buy now pass provides sample size calculations for over 370 more scenarios than any other sample size software and 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 learn more buy now a robust statistical and graphics program ncss is used in a variety of industries from medical investigation and business analytics to engineering quality control and academic research learn why thousands of researchers consultants professionals engineers and scientists are using ncss worldwide publications citing ncss and pass we have used your product for almost 20 years it has been a vital part of the research initiatives we have conducted over the years through each version of ncss we have been able to count on its user friendly design broad range of statistical tools and a high level of very personalized customer support dr george ebra dr debra guest research pass is a great program it does so much and is easy to use it s much better than the other sample size programs i ve used it has helped me greatly in my research ken lawson ph d the university of texas sample size pass 2026 procedures info videos what s new in pass 2026 free trial pass documentation system requirements publications citing pass customer satisfaction order data analysis ncss 2026 procedures info videos what s new in ncss 2026 free trial ncss documentation academic institutions system requirements publications citing ncss customer satisfaction order industries medical research academia business research quality control mass appraisal classroom support about us contact us support downloads faq training store online store price lists my account copyright 2026 ncss all trademarks are the properties of their respective owners privacy policy terms of use sitemap