PASS 12 is an easy-to-use research tool for determining the
number of subjects that should be used in a study. PASS
software performs power analysis and calculates sample sizes for
over 150 statistical tests.
PASS at a glance!
PASS 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 want
technical justification of the sample size you have used). Use it
after a study to determine if your sample size was large enough.
PASS calculates the sample sizes necessary to perform all of the
statistical tests listed below.
A power analysis usually involves several ?what if? questions.
PASS lets you solve for power, sample size, effect size, and alpha
level. It automatically creates appropriate tables and charts of
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 complete help system documentation that
contains tutorials, examples, annotated output, references,
formulas, validation, and complete instructions on each procedure.
All procedures are validated with published articles or books.
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.
PASS displays charts and graphs automatically
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.
Choose PASS. It's more comprehensive,
easier-to-use, accurate, and less expensive than any other sample
size program on the market.
PASS 12 adds over 15 new
power and sample size procedures to PASS, including z tests (3),
conditional power (6), repeated measures (2), non-inferiority
logrank (2), equivalence logrank (2), Lin?s concordance
coefficient (1), probit analysis (1), and competing risks (1).