John Paul Rebadulla Crescini successfully completed the online Coursera course "Mastering Data Analysis in Excel" authorized by Duke University. The certificate verifies that John Paul completed the course and Coursera confirmed his identity and participation. The certificate is signed by Jana Schaich Borg, a Post-doctoral Fellow in Psychiatry, and Daniel Egger, Director of the Center for Quantitative Modeling at Pratt School of Engineering, who verify that John Paul earned the certificate on November 26, 2015 for completing the data analysis course.