Introduction: In general, sample
size calculation is conducted through a prestudy power analysis. Its
purpose is to select an appropriate sample size in achieving a desired power
for correctly detection of a prespecified clinical meaningful difference at a
given level of significance. This study/tool will provide statistical
procedures for determination of sample size required not only for testing equality, but also for testing noninferiority/superiority, equivalence (similarity), some survival analysis and phase II clinical trials designs that
are commonly employed at various phases of clinical development. As a handful
tool, it is very useful for clinical scientists and biostatisticians in the
pharmaceutical industry, regulatory agencies, academia, and other researchers.
This program helps users to determine
sample sizes and confidence intervals for a wide range of statistical techniques including means, proportions, survival analysis,
phase II clinical trials,epidemiological studies and some general cases).
DIRECTIONS:


1. Cohort Studies 2. CaseControl Studies 3. Cross Sectional Studies 4. Regression 