StatLetter is a free tool. By using StatLetter, you agree to these terms.
StatLetter provides statistical significance testing for market research data. All calculations run in your browser using standard two-proportion z-tests. The tool is provided free of charge.
StatLetter is a calculator, not a consultant. Results should be interpreted in the context of your study design, weighting approach, sampling methodology, and professional judgment. We make no guarantees about the suitability of any particular statistical test for your data.
Your data never leaves your browser. We have no access to the numbers you enter, the results you generate, or the files you export. You are solely responsible for the accuracy of your input data and the interpretation of results.
StatLetter is provided "as is" without warranty of any kind. We do not guarantee uninterrupted availability, error-free calculations, or fitness for any particular purpose. While we implement standard, well-documented statistical methods, you should verify critical results independently.
The operators of StatLetter are not liable for any damages arising from the use of StatLetter, including but not limited to decisions made based on the tool's output.
We may update these terms. Continued use after changes constitutes acceptance.
Questions about these terms: Email us