PASS
Power Analysis and Sample Size
The Best Power Analysis Software on the
Market
Power Analysis
A statistical
test's power is the probability that the test procedure will result in
statistical significance. Power is related to the sample size, the size
of the type I (alpha) error, the actual size of the effect, and the size
of experimental error. All of these must be considered in order to
calculate statistical power. As statistical significance is usually the desired outcome, planning and
running a study to achieve a high power is of prime importance to the
researcher. Because of the complexity of the calculations, the
determination of the power is often ignored or only a casual attempt is
made at its calculation by adopting some, so-called, "rule-of-thumb."
PASS Beats the Competition!
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 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. You can use it with any statistical analysis software
you want.
Click here for the PASS 11
minimum system requirements.
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 three manuals that contain tutorials,
examples, annotated output, references, formulas, validation, and
complete instructions on each procedure. And, if you cannot find an
answer in the manual, our free technical support staff (which includes
three
PhD statisticians) is available.
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. Validation. Each procedure in PASS is fully-documented and validated
using published literature. Validation examples are
presented at the end of each procedure chapter in the
documentation.
Choose PASS. It's more comprehensive, easier-to-use, and accurate than any other sample size program on the market. Features.
PASS is the most comprehensive sample size program available with over
165 statistical procedures.
Accuracy of each procedures is well validated. PASS is easy to learn and
use. PASS is a standalone software package (no other stat package is
required). PASS easily produces sharp, flexible graphics. PASS output is easily transferred to popular word processors and
presentation software such as PowerPoint.
Pricing. PASS is affordable. A PASS 11 single-user perpetual license sells for
$1095 (commercial) and $795 (academic
/government). We also offer special pricing for current students. Call for details.
Multiple-user discounts are also available. You can order from our secure
online order form, by
email, by fax, or over the phone.
7-Day Trial. Go ahead,
download a 7-day trial
version of PASS today. You can try all of the statistical
procedures and print your reports. This is an
excellent way to become acquainted with PASS. Training. A 4-week, online training course on using PASS is now being offered through statistics.com. The course is
taught by Dr. Thomas P. Ryan. Click
here for more information. |
