Get in touch
zstat.org is maintained by an independent developer. Email is the only channel — there is no support ticketing system, no social media account and no contact form that quietly discards messages.
Email: info@about-imd.com
Please write in English, Traditional Chinese, Simplified Chinese, Korean or Japanese. Replies are usually within a few days.
Reporting an error
Corrections are the most valuable thing you can send, and they get priority over everything else. If a number on this site is wrong, it is wrong for everyone who uses that page, so please do report it.
To make a correction quick to act on, include:
- Which page — the URL is ideal.
- What you entered — the exact inputs that produced the wrong result.
- What it showed, and what it should have shown.
- Your source, if the correction concerns reference data — a link to the official document carries far more weight than a recollection, and lets the fix be verified rather than taken on faith.
Errors in the mathematics are treated as urgent. Errors in admission reference data are corrected and the entry's verification date is updated so the change is visible.
Suggesting a tool or a language
Requests for additional tools are welcome. The ones most often asked for — non-parametric tests, post-hoc tests after ANOVA, confidence intervals on effect sizes — are known gaps, listed openly on the methodology page, and are the most likely additions.
If you would like to see the site in another language, say so. Adding a language means translating every tool and its documentation, so it is a substantial job, but demand is what decides the order.
What I cannot help with
To set expectations honestly, some things fall outside what this site can do:
- Individual admission advice. I cannot tell you whether your score will get you into a particular programme. The placement bands are historical orientation, not prediction, and the only reliable answer comes from the institution's own admissions office.
- Interpreting your specific research data. The tools compute standard tests and the pages explain what the results mean in general, but choosing an analysis for a particular study is something your supervisor, a statistician or your institution's methods support can do properly and I cannot from an email.
- Official verification. This site is not affiliated with JUPAS, the HKEAA, Taiwan's CEEC, KICE, Japan's National Center for University Entrance Examinations, China's Ministry of Education or any university, and cannot confirm or issue anything official.
- Recovering your inputs. Nothing you type into the calculators is stored anywhere, including by me. Once you close the page it is gone.
Privacy of your message
Emails sent to the address above are read only by the site maintainer and are not added to any mailing list, shared with third parties, or used for advertising. How the site itself handles data is set out in the privacy policy.