| PASS
2008 Upgrade
We are
pleased to announce the release of PASS 2008. This edition of
PASS has been split from NCSS and now functions as an independent
application. PASS 2008 adds over 40 new power and sample size
procedures and features to PASS, including procedures for
mixed models, kappa testing, Normality testing,
Cochran-Armitage proportion trend testing, new survival analysis
procedures, tools to create randomization lists, several
confidence interval procedures, several design of experiments
procedures, microarray gene expression comparison tools, an
enhanced user interface, an improved help system, and the
ability to create macros (which add programmability and
streamline repeated tasks).
All templates from previous versions of
PASS are fully compatible with PASS 2008.
PASS 2008 is fully compatible with Windows
7, Vista, and XP on both 32-bit and 64-bit operating systems.
New Procedures
Mixed
Models
Logrank (Survival) Tests
Logrank Non-Inferiority Tests
Randomization
Lists
Kappa Test for
Agreement Between Two Raters
Confidence
Intervals - Means (6 Procedures)
Confidence
Intervals - Proportions (2 Procedures)
Confidence
Intervals - Regression Slope
Confidence
Intervals - SD/Variance (8 Procedures)
Confidence
Intervals - Correlation
Microarray One-Sample/Paired
T-Tests
Microarray Two-Sample
T-Tests
Cochran-Armitage Proportion Trend Tests
Normality
Tests
Longitudinal Time-Averaged Differencing - Two Means
Longitudinal Time-Averaged Differencing - Two Proportions
Design of
Experiments (9 Procedures)
New Features
Simplified Interface
Improved Help System
Quick Launch
Macros (Programmability)
Prices
Upgrade from PASS 2005:
$349.95 (academic/government)
$399.95 (commercial)
Upgrade from Earlier Versions:
$449.95 (academic/government)
$499.95 (commercial)
Click here to view complete price lists.
Ordering
To order your upgrade, call us at 1-800-898-6109 (US only) or (801) 546-0445, fax us at (801)
546-3907, email us at
sales@ncss.com, or order
from our secure
online order form.
Documentation
PDF versions of the documentation are available directly
from each procedure window. These may be displayed or printed. The
documentation is also available in the help system. You can purchase a
printed copy of the three manuals for $100.
Mixed Models
The new
Mixed
Models procedure uses simulation to power analyze a variety of
experimental designs for comparing means in which the response is
continuous. The procedure focuses on models that are commonly used to
analyze longitudinal (repeated measures) data, but can also be used to
determine power for split-plot designs, cross-over designs, factorial
designs, etc.
Logrank Tests
Five new logrank test procedures greatly improve the
accuracy and ability to compute the sample size and power of the logrank
test for equality or
non-inferiority of survival distributions under
very general assumptions. Accrual time, follow-up time, loss during
follow-up, noncompliance, and hazard rates may vary with time. The
parameterization can be in terms of hazard rates, median survival time,
proportion surviving, or mortality.
Randomization Lists
This procedure creates
randomization
lists for assigning subjects to one of up to eight treatments. Six
randomization algorithms are available. Four of the algorithms (Efron’s
biased coin randomization, Smith’s randomization, Wei’s urn
randomization, and random sorting using maximum allowable % deviation)
are designed to generate balanced random samples throughout the course
of an experiment. The other two (complete randomization and random
sorting) are less complex but have higher probabilities of imbalance.
Kappa Test for Agreement Between Two
Raters
This procedure computes power and sample size
for the test of agreement between two raters using the
kappa statistic.
Calculations are based on ratings for k categories from two raters or
judges. You are able to vary category frequencies on a single run to
analyze a wide range of scenarios at once.
Confidence Intervals
Eighteen new confidence interval procedures
have been added to PASS 2008. These procedures cover confidence
intervals for
one mean,
two means,
one standard deviation,
one variance,
two variances,
one proportion,
two proportions,
regression slope,
and
one
correlation. In some procedures tolerance probabilities or relative
error may additionally be specified.
Microarray T-Tests (One- or
Two-sample, Paired)
Two new microarray procedures estimate the power and number of arrays
required for
one-sample,
two-sample, and
paired sample t-tests of
microarray gene expression data. False discovery rate and
experiment-wise error rate control methods are available in this
procedure.
Cochran-Armitage Proportion Trend Test
This procedure computes power and sample size
for the
Cochran-Armitage test for a linear trend in proportions. Asymptotic
and exact power calculations for the uncorrected and
continuity-corrected tests are available.
Normality Tests
This procedure uses simulation to determine
the power of eight
normality
tests (Anderson-Darling, Kolmogorov-Smirnov, Kurtosis,
Martinez-Iglewicz, Omnibus, Range/SD, Shapiro-Wilk, and Skewness). A
wide variety of alternative distributions can be specified in this
procedure.
Longitudinal Time-Averaged
Differencing - Two Means/Proportions
Two new time-averaged differencing procedures calculate the power for
testing the time-averaged difference between
two means or
two
proportions in a longitudinal design. The data from such a design are
often analyzed using mixed models software. Measurements may be taken at
pre-determined times or at random times.
Design of Experiments
Nine new
experimental design
procedures have been added to PASS 2008. The procedures generate designs
based on the number of desired factors and desired number of levels of
each factor. The experimental design procedures are Two-Level,
Fractional Factorial, Balanced incomplete Block, Latin Square, Response
Surface, Screening, Taguchi, D-Optimal, and the Design Generator.
Simplified Interface
The
interface has been redesigned to make the user input easier to
complete. Boxes containing descriptive titles have been added to group
similar options. This allows for easier navigation of the procedure
windows and faster identification of input categories. Input boxes have
also been made to gray out when inactive.
Improved Help System
The
PASS Help System has been designed for easier searching and
printing. Chapter and keyword indices have been added, and the entire
Help System is now searchable. Individual PDF chapters can be printed as
well as whole sections of the manuals.
Quick Launch
The
Quick Launch window contains a button
corresponding to each procedure in the system. The Quick Launch window
makes it easy to find and launch any procedure.
Macros (Programmability)
The
Macros
feature utilizes a batch language
that lets you create and run macros (scripts/programs) for repeated
tasks. With the click of a single button, the program will run a series
of procedures.
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