https://dackohn.com/blog/Notes on building practical AI systems and statistics tools.https://dackohn.com/blog/offline-meeting-minutes-ai.htmlhttps://dackohn.com/blog/offline-meeting-minutes-ai.htmlTue, 06 Oct 2026 12:00:00 GMTSix lessons from building a fully offline pipeline that turns meeting audio into structured minutes: multilingual speech recognition, hallucination checks, structured extraction with a local LLM, and why practical AI is mostly engineering.https://dackohn.com/blog/central-limit-theorem-simulation.htmlhttps://dackohn.com/blog/central-limit-theorem-simulation.htmlTue, 06 Oct 2026 12:00:00 GMTWatch skewed data, dice and two-humped populations turn into bell curves, see how big n really needs to be, and find out when the Central Limit Theorem fails.https://dackohn.com/blog/what-makes-statistics-tools-reliable.htmlhttps://dackohn.com/blog/what-makes-statistics-tools-reliable.htmlTue, 06 Oct 2026 12:00:00 GMTHow to tell whether a free statistics calculator is right: method choice, checks against reference software, simulation, edge cases, transparency, and the real problems our own checks caught.https://dackohn.com/blog/interpreting-effect-size.htmlhttps://dackohn.com/blog/interpreting-effect-size.htmlTue, 06 Oct 2026 12:00:00 GMTTurn effect sizes into a story readers understand: Cohen's d in plain language, why the small/medium/large labels mislead, and how to report effects with uncertainty. Includes an interactive visualizer.https://dackohn.com/blog/compare-groups-chi-square-nonparametric.htmlhttps://dackohn.com/blog/compare-groups-chi-square-nonparametric.htmlTue, 06 Oct 2026 12:00:00 GMTChi-square and Fisher's exact test for categories, Mann-Whitney, Wilcoxon and Kruskal-Wallis for ordinal or non-normal data: which to use, worked examples, and effect sizes.https://dackohn.com/blog/document-statistical-analysis-thesis.htmlhttps://dackohn.com/blog/document-statistical-analysis-thesis.htmlTue, 06 Oct 2026 12:00:00 GMTA checklist for writing up statistical analyses in a thesis or report, with APA-style reporting examples for t-tests, ANOVA, chi-square, correlation and Mann-Whitney, and the mistakes to avoid.