Ji An Email & Phone Number

Mountain View, Ca, Us

Mountain View, Ca, Us

Led a variety of end-to-end projects, some of which are now in production:- conducted deep dive analyses to address customer’s interests;- investigated the patterns of user behaviors and generated learner types;- developped suprvised machine learning models for predictive applications;- evaluated the effect of online services in both experimental and non-experimental settings;- communicated complicated work to (non-)technical stakeholders on a regular basis;- partnered closely with the product and engineer teams to put the research into production.

San Francisco, Ca, Us

- Provided actionable insights to a startup credit card company Final (https://getfinal.com/, later on was acquired by Goldman Sachs, and now they make Apple Card!) to improve the performance of their core product-virtual cards.- Implemented cluster analyses via partitioning around medoids (PAM) algorithm for efficient merchant classification; built a predictive model via random forest for fraud detection (100k+ transactions).

New York, Ny, Us

- Developed a missing data imputation model via random forest to measure TV/text program ratings across all device platforms such as mobile, desktop etc. (Collaborated with Facebook).- Presented the model to Nielsen data science leadership team and the model is under consideration to be incorporated into the product (Nielsen Digital Content Ratings).

College Park, Md, Us

- Identified key quantitative metrics, formulated hypotheses, and designed statistical/methodological approaches for multiple vaccine-related public health projects funded by Centers for Disease Control and Prevention (CDC).- Designed survey/questionnaires, and analyzed national survey data using a variety of statistical modeling methods, e.g., regression, factor analysis, structural equation modeling, tree analysis, etc.- Regularly communicated statistical results/findings, helped spread quantitative research practices to qualitative team members, and drafted papers for publications (covered by media reports).

Vienna, Va, Us

- Developed and programmed a scoring model/testing system for a national high-stake examination, which is officially being used by National Institute for Occupational Safety and Health (NIOSH).

- Completed a project on automated essay scoring (AI scoring) using machine learning and hypothesis testing. - Presented the findings to the quantitative research team and at a national conference (NCME).

College Park, Md, Us

- Instructor for Introduction to Educational Statistics (EDMS 451-undergraduate level). - Topics included: hypothesis testing, linear regression, probability, sampling distribution, and correlation, etc.- Responsibilities included: developing course plans, teaching, holding office hours, grading the assignments and exams.- Teaching assistant for Quantitative Research Methodology II (EDMS646-graduate level). Both courses were provided by Measurement, Statistics and Evaluation Program at the University of Maryland

College Park, Md, Us

- Teaching assistant for Introduction to Educational Statistics (EDMS451-undergraduate level). Responsibilities include: leading review and discussion sections, holding office hours on behalf of the instructor, grading the assignments and exams.

Riverdale, Maryland, Us

- Managed STARTALK Chinese programs (>50, nationwide) contracted with National Security Agency (NSA).- Collected program data, managed the program database, and evaluated programs by participating in state wide site visits, conducting interviews, and reviewing proposals.- Sponsored program representatives and external consultants to ensure successful programs through monitoring and tracking program progress.

- Taught Chinese language and culture, mathematics, and social studies.- Assessed and evaluated students' performances and achievements.

Doctor Of Philosophy - Phd, Measurement, Statistics And Evaluation

M.A., Measurement, Statistics And Evaluation

M.A., Teaching And Curriculum

B.A., Teaching Chinese As A Foreign Language