Data Science Portfolio

A web app for Classical Test Theory item analysis with automated HTML/Word report generation in Indonesian to facilitate routine item analysis semi real-time.

An online Rasch model analyzer to democratize access to statistical tools for Rasch measurement analysis, with verified reliability comparable to industry-standard Winsteps (ICC = 0.9974). Now enhanced with AI-generated interpretation.

A comprehensive analysis of the IELTS Academic Reading passage corpus, categorizing texts by readability and mapping each word's difficulty to corresponding CEFR levels.

A web app for evaluating changes in training participants' knowledge using pretest and posttest results. It automatically generates reports in Indonesian, assesses normality assumptions, and selects the appropriate statistical test: paired t-test or Wilcoxon test.

BISA-Bot (Bot for Intelligent Support & Assistance) is an AI-powered assistant based on Telegram.  BISA means "can" in Indonesian, reflecting the bot’s capability to assist in various domains, including education and technology.