The leading data analysis and statistical solution for Microsoft Excel. XLSTAT is a powerful yet flexible Excel data analysis add-on that allows users to analyze, customize and share results within Microsoft Excel. Advanced power and sample size calculator online: calculate sample size for a single group, or for differences between two groups (more than two groups supported for binomial data). Sample size calculation for trials for superiority, non-inferiority, and equivalence. Binomial and continuous outcomes supported. Calculate the power given sample size, alpha and MDE.
PASS software provides sample size tools for over 965 statistical test and confidence interval scenarios - more than double the capability of any other sample size software. Each tool has been carefully validated with published articles and/or texts.
Get to know PASS by downloading a free trial, viewing the video to the right, or exploring this website.
PASS comes complete with integrated documentation and PhD statistician support.
Kindergartenmrs. macsmith's marvelous music site website. PASS has been fine-tuned for over 20 years, and is now the leading sample size software choice for clinical trial, pharmaceutical, and other medical research. It has also become a mainstay in all other fields where sample size calculation or evaluation is needed.
In PASS, you can estimate the sample size for a statistical test or confidence interval in a few short steps. If you need guidance during any of the steps, PASS has excellent documentation, there are free training videos, and you can contact our team of PhD statisticians.
Finding the sample size procedure is easy using the drop-down menu, the procedure search, or the category tree. Watch a short video to learn how to select your desired procedure in PASS.
The sample size procedure tools are easy to use and have built-in help messages for every option.
Enlarge the infographic to see the descriptions of the ways that PASS helps you to enter the proper values in a sample size procedure tool. You can also watch this video to see an example of using a procedure window in PASS.
When a PASS procedure is run, the sample size results and corresponding plots are displayed in the output window. The sample size or power curves can be clicked to be shown in a separate window for viewing or saving.
Navigation of the output is easy with the output navigation tree. The format of the output makes it easy to be viewed, copied and pasted, or saved. Multiple output runs can be sent to the output gallery for saving or for comparing sample size analyses.
To take a video tour of the output window in PASS, click here.
Welcome to the calculators home page of PowerAndSampleSize.com!Not much to go over here. Our calculators are pretty self-explanatory. At the top of each calculator's page you'll find a form and a graph. Enter values in the form, then you can examine the graph to learn how sensitive the required sample size is to the input values you've provided
You can navigate the calculators using the menu to the left. There, you'll also find links to further documentation, including usage instructions, references, and a validations page comparing our calculators' output to published results.
Below each calculator you'll find a description of the calculator and the situations in which it may be useful. We've also included the underlying mathematical formula, R code so you can implement custom calculations, and one or more literature references that give further details.
Please feel free to comment below; comments are also available at the bottom of each calculator's page.
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