lewan@utcs.uucp (S. Lewandowsky) (12/09/85)
Regarding the recent requests for info on stats packages, I suggest
looking at PowerStat--the following is from one of their announcements.
The package is really easy to use, and is light years ahead of others
in the user interface.
Analytical Engineering Corporation has released Version 1.0 of PowerStat,
a fully integrated statistics package for the IBM PC and true compatibles.
o System Requirements
192K RAM and two DSDD drives minimum. DOS 2.0, or later.
Mono or color adaptor. Hard disk and math coprocessor
supported but not essential.
o Statistics
BASIC Means, standard errors, variances, standard deviations,
quartiles, percentiles, t-tests, nonparametrics, correlations.
DISPLAYS Stem-and-leaf, boxplots, histograms, scatter plots.
REGRESSION All possible regressions, stepwise, R-squared, Mallows' C(p),
regression ANOVA, Type I and II SS, fitted values, residuals,
t-tests, standard errors, hypothesis tests, output data sets.
ANOVA Any design with up to 10 factors, model specification
language,automatic generation of sourcesof variation,
balanced or unbalanced designs, unequal n, missing data,
Type I through III SS, repeated measures, Latin squares,
incomplete designs, nested designs.
CATEGORICAL Chi squared and G squared tests, up to 10 way cross tabulation,
expected frequencies, residuals, percentages, loglinear models.
MULTIVARIATE Correlation, principal components, factor analysis, rotation.
o Human Factors
Instant context sensitive help windows, novice and advanced
help, variable name reminder windows, pointer command system
with very few keystrokes, procedure option windows, command
anticipation, customized setup, graceful error handling, work
in progress indicators, output to screen and/or printer and/or
file, data input under user program control, input checking.
Automatic keyboard toggling, advanced user meta commands.
o Data Management
Common "records by variables" data set format, no conversion
necessary for different procedures. Hierarchical file system,
data set libraries, data set browser and full screen editor,
sort on up to 10 variables, automatic backup, 150 variables,
32767 records, append, set, merge, export, import, automatic
treatment of missing data, BY groups for subset analysis.
Upload/download to mainframe SAS, SPSS, BMD, etc. Communicate
with Lotus 1-2-3, dBASE, Symphony, etc.
o User Language
Numeric and character variables, arithmetic and logical and
character operators, functions, random number generators,
assignment statements, comments, do-end, if-then-else, input,
keep, drop, record, rename, return, stop, write, label, set,
merge, delimiter, delete, missing, goto. Hierarchical program
libraries, full screen editor.
o Documentation
524 page manual in IBM style binder. Introductory tutorial.
o Price and Availability
Single copy US$395. Quantity discounts and site licenses.
Special rates for networks. Not copy protected.
Analytical Engineering Corporation
P.O. Box 9, Station P
Toronto, Ontario
Canada M5S 2S6
(416) 960-3030 (Visa/Mastercard 24 hrs)
o Two Diskette Demonstration
Available for US$8. Contains data set management and BASIC,
DISPLAYS, and REGRESSION as shown above. Data set creation
arbitrarily limited to 100 records, but full 150 variables.
Payment must accompany orders. 40 page instructions/examples.
Note that other packages (e.g. SYSTAT, SPSS/PC, SAS/PC?) are copy
protected--which is fine if you like that kind of thing.
Please do not send mail to me. Communicate directly with AEC.