Terms of Use

These terms govern your use of TableSigma (tablesigma.com). By using this site, you agree to them.

What TableSigma offers

TableSigma provides free, publicly accessible statistics reference tables and calculators (z table, t table, chi-square table and related tools). Results are generated for general reference and educational use.

Printing and sharing tables and PDFs

You may print or save any table or PDF from TableSigma and share or distribute it for personal study or non-commercial classroom use — for example, a teacher handing out a printed z table to a class — as long as TableSigma is credited as the source. You may not resell a TableSigma table or PDF, redistribute it as part of a paid product or course, or embed the full table in bulk into another commercial product or publication without contacting us first.

Academic use

Table and calculator results are provided for learning and reference. They are a tool to check or speed up a lookup, not a substitute for understanding the underlying statistical method, and TableSigma does not complete coursework, assignments or research analysis on a user’s behalf. Always verify a result against your course materials or a qualified instructor before relying on it for graded work or published research.

User-submitted content

If you submit a “worked example,” an error report, or a message through the contact form, you confirm it is your own content and grant TableSigma permission to display, edit for length or clarity, or decline to publish it. You retain ownership of what you submit. Do not submit content that is unlawful, infringing, or contains someone else’s personal information without consent.

No affiliation

TableSigma is an independent reference site. Any product, course, textbook, institution or brand named on this site is the property of its respective owner; mentioning it does not imply endorsement by or affiliation with TableSigma.

Limitation of liability

TableSigma is provided “as is,” without warranty of any kind. While table values are computed from standard, documented distribution formulas and checked against reference examples, we do not guarantee the site will be error-free or uninterrupted, and we are not liable for decisions made based on results from this site.

Acceptable use

Do not attempt to disrupt, scrape at an abusive rate, or interfere with the operation of this site, or use it to transmit unlawful or harmful content.

Governing law

These terms are governed by United States law applicable to the jurisdiction in which TableSigma operates (specific state to be confirmed), without regard to conflict-of-law principles.

Changes to these terms

We may update these terms from time to time; the date below reflects the latest revision. Continued use of the site after a change constitutes acceptance of the updated terms.

Contact

Questions about these terms can be sent through the Contact page.