One can also calculate power and sample size for the mean of just a single group. The sample size and power calculator uses the Z-distribution (normal distribution). 3. Baseline The

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G*Power is a free software used to calculate statistical power. G*Power offers the ability to calculate power for a wide variety of statistical tests including t-tests, F-tests, and chi-square

## What our customers say

That way I can see the answers in a clear, simple, small text bubble without having to scroll for it. It'd be much better if you people improve this things, it helps in pretty all kinds of problem. Shows all working out and answer of your question, only thing I would like to be different is to be able to scan graphs, thank you.

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Edit: They have issued a refund now, ita great i can finnaly get good grades well knowing what im doing because of the explain steps, very useful. Great app, makes math alot easier.