STATISTICAL ANALYSIS & DATA ANALYSIS
NCSS has specialized in providing statistical analysis software to the occassional user of statistics. Our current release, NCSS 2017, is comprehensive, easy to use, and runs under Windows 7/8/10/vista/XP sp2.
PASS 15 - POWER ANALYSIS AND SAMPLE SIZE
performs power analysis and calculates sample sizes. Use it
before you begin a study to calculate an appropriate sample
size (it meets the requirements of government agencies that
demand technical justification of the sample size you have
used). Use it after a study to determine if your sample size
was large enough.
PASS lets you solve for power, sample size, effect size, and alpha level. It automatically displays charts and graphs along with numeric tables and text summaries in a portable format that is cut and paste compatible with all word processors so you can easily include the results in your proposal.
PASS is a standalone system. Although it is integrated with NCSS, you do not have to own NCSS to run it. You can use it with any statistical software you want.
PASS is accurate. It has been extensively verified using books and reference articles. Proof of the accuracy of each procedure is included in the extensive documentation.
PASS comes with the original 490-page manual and a 250 upgrade manual that contain tutorials, examples, annotated output, references, formulas, verification, and complete instructions on each procedure. And, if you cannot find an answer in the manual, our free technical support staff (which includes a PhD statistician) are available.
PASS Beats the Competition!
No other program calculates sample sizes and power for as many different statistical procedures as does PASS. Specifying your input is easy, especially with the online help and manual.
Choose PASS. It's more comprehensive, easier-to-use, accurate, and less expensive than any other sample size program on the market.