An individual named Robert McCall successfully completed with distinction a 4-week online non-credit course called "The Data Scientist's Toolbox" offered through Coursera and authorized by Johns Hopkins University. The certificate was signed by Jeff Leek, Roger Peng, and Brian Caffo from the Department of Biostatistics at the Johns Hopkins Bloomberg School of Public Health and verifies Robert McCall's identity and participation in the course, though it does not confer academic credit or official university status.