Using a calculator on StatsCalc means you agree to the terms below. Read them, they are short.
Each tool implements a published statistical formula, the sample or population standard deviation, a z, t or chi-square p-value, a normal-distribution confidence interval, and so on, and runs it against whatever numbers you type in. The output is a planning and study number, not a peer-reviewed analysis, a certified calculation, or professional statistical consulting.
The site and every calculator on it are provided "as is," without a warranty of accuracy, fitness for a particular purpose, or anything else. We check each formula against a published source, but we cannot guarantee a specific result matches every textbook edition or software package's rounding convention.
We are not liable for a decision, a grade, a paper, or a business outcome that rests on a number this site produced. If a result needs to hold up under review, verify it independently before relying on it.
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Do not scrape, resell, or republish the calculators themselves as your own product. Guides and articles may be quoted with a link back to the original page.
We may update this page as the site changes. Continuing to use the calculators after an update means you accept the current version.