Okay, let’s tackle this. So Yan Hui has a Ph.D. in Statistics from Stanford University, which is a highly prestigious institution. He has 8+ years of experience in data analysis and interpretation, which is a significant amount of time to develop expertise. Skills like machine learning and statistics are in high demand, especially in the tech industry. Location is San Diego, California, which is known for its strong tech industry and high cost of living. Considering these factors, I estimate Yan could charge around $125 per hour, which is below the national average for data scientists but still competitive given his location and education.