I submitted my resume to the internship posting online and received a call a month later. I had a screening phone interview with the principal researcher. The questions were mostly about my resume. On-site interview was an hour. Given a clinical study to read for fifteen minutes and discuss. Also grilled for half hour by three other biostatisticians about my resume. Easy questions about different programming tools and my experience with them. Thought it went really well, but reject email before I even got home that day.