Profile Details

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Hire Dr. Calvin G.

United States

USD 40 /hr

Freelance Statistician & Data Analyst | Expert in R & SAS

Profile Summary

I am a PhD-level statistician with a strong background in advanced data analysis, statistical modeling, and research methodology. With extensive experience collaborating across academic, clinical, and industrial research projects, I provide expert support in data visualization, hypothesis testing, predictive modeling, manuscript writing, and other high-quality statistical services. My professional interests lie at the intersection of technology, statistics, and programming. I am committed to clear communication, scientific rigor, and delivering actionable insights, I am more than eager to help move your project forward effectively.

Subject Matter Expertise

• ☆ Biostatistics
• ☆ Data Analysis
• ☆ Data Visualization
• ☆ Statistics
• ☆ Statistical Theory
• ☆ Applied Statistics
• ☆ Regression Analysis
• ☆ Multivariate Analysis
• ☆ Nonlinear Regression
• ☆ Bayesian Statistics
• ☆ Correlation Analysis
• ☆ Statistical Computing
• ☆ Mathematical Statistics
• ☆ Health Data Analysis
• ☆ SAS
• ☆ R
• ☆ Technical & Scientific Writing
• ☆ Manuscript & Journal Article Writing

Services

• Research
• Data & AI

Research Market Research, User Research, Scientific and Technical Research

Data & AI Predictive Modeling, Statistical Analysis, Data Visualization, Big Data Analytics, Data Cleaning, Data Processing, Data Insights

Work Experience

Statistics Intelligence Analyst

Mercor

April 2025 - Present

Assistant Manager

Star Market

April 2025 - Present

Clerk

Star Market

September 2024 - April 2025

AI Expert Contributor: Statistics

Snorkel AI

January 2025 - March 2025

Graduate Teaching Fellow

Boston University

January 2024 - May 2024

Ph.D. Research Fellow

Boston University

September 2017 - May 2024

Associate Programmer Analyst

Abt Associates Inc.

October 2012 - March 2015

Data & Programming Assistant

Framingham Heart Study

July 2009 - September 2012

Education

Doctor of Philosophy (Statistics)

Boston University

September 2017 - May 2024

Master of Arts (Statistics)

Boston University

January 2016 - May 2017

Bachelor of Arts ( Mathematics & Economics)

Boston University

September 2008 - May 2012

Certifications

• Doctor of Philosophy in Statistics (CeDiD:248R-F0IK-CVNP Name:CA)

  Boston University

  https://www.bu.edu/phpbin/cecredential/validate/

  May 2024 - Present

• SAS Certified Advanced Programmer for SAS9

  SAS Institute Inc.

  https://www.credly.com/badges/e14a39fb-883b-446d-9c61-d7d3877d21af

  August 2008 - Present

• SAS Certified Base Programmer for SAS9

  SAS Institute Inc.

  https://www.credly.com/badges/a49a406e-24f6-4186-b516-af9a015f0f5b

  July 2008 - Present

Publications

JOURNAL ARTICLE

Guan Calvin, Au Rhoda, Ang Alvin, Gangopadhyay Ashis (2024). Analyzing the Covariance Structure of Plasma Signaling Proteins in Relation to the Diagnosis of Dementia . International Journal of Clinical Biostatistics and Biometrics.

Calvin Guan, Ashita Gurnani, Brandon Frank, Stacy Andersen, Sherral Devine, Landon Hurley, Chunyu Liu, Honghuang Lin, Rhoda Au (2023). A - 3 Quantifying the Richness of the Boston Process Approach (BPA) Using a Novel Analytic Approach: the Framingham Heart Study . Archives of Clinical Neuropsychology.

DISSERTATION THESIS

Calvin Xin Guan (2024). Usage of hypothesis testing methods for the equivalence of covariance matrices in dementia outcome analysis .

PREPRINT

Calvin Guan, Ashis Gangopadhyay (2023). A functional perspective on the conditional covariance comparison problem in dementia analysis .

CONFERENCE PAPER

Calvin Xin Guan, Louise S. Hadden (2013). EXCELing in DDE: Unlock Useful Tools for Processing Excel® . NESUG 2013.