StudySize is
a user friendly Windows application to calculate the sample size
needed in a study, survey, or experiment. It
can be used to study a range of scenarios when the plan is to test,
give an estimate, or calculate a confidence interval for the parameter
of interest.
It comprises
a wide range of procedures with examples and explanations of the parameters in a help menu. There
is also a separate pdf document with the examples for printout.
The results are presented as tables or graphs and summarized in
text to be copied and pasted into slides or other documents.
The calculations
in StudySize have been validated against the articles they are based
on as well as against other sample size software.
Summary
of features.

Calculations
for most standard tests as well as for specific parameters in
common statistical distributions

Comprises
hypothesis testing, point estimation, and confidence interval

Any
parameter can be calculated (not only sample size and power)

Simultaneous
power comparisons in multiple windows

Results
presented as single values or in tables and graphs grouped by
two other parameters

Text
summary and description of performed analysis

Probability,
distribution, and hazard function plots for common statistical
distributions.

Monte
Carlo simulation option when large sample formulas may be inappropriate

Equivalence
and noninferiority testing for most tests

Group
sequential methods for the most common designs

Multiple
comparisons using the most common approaches

A
wide range of nonparametric tests for different assumed statistical
distributions