Download StudySize v2.0
StudySize is a program for statistical power and sample size calculation. It includes the most common tests, point estimates and confidence intervals. Any parameter may be calculated (not only power or sample size) and can be presented as a single value or in a table or graph grouped by the values of two other parameters. Multiple windows make it easy to compare sample size for different tests and/or confidence intervals.
Includes group sequential designs, both based on p-values for tests and on the width of confidence intervals. Estimates of the actual significance level and power as well as the actual confidence level (coverage probability) and the probability of the width for confidence intervals can be calculated when large sample approximation formulas are not adequate.
Features:
- Easy to use
- Calculations for most standard tests as well as for 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
- Includes equivalence- and non-inferiority testing for most tests
- Monte Carlo simulation when large sample formulas are inappropriate
- Group sequential interim analyses by Monte Carlo simulations for most tests and confidence intervals
- Non-parametric tests (Wilcoxon-Mann-Whitney test, Wilcoxon signed-rank test, and Sign test)
- Results presented as single values or in tables and graphs grouped by two other parameters
System Requirements:
- IBM compatible computer with a Pentium processor 133MHz or higher
- 10 MB of free disk space
- 64 MB of RAM.
- Windows 95/98/Me/2000/NT/XP/Vista
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StudySize v2.0
(14 days trial version)