InterMedia Survey Institute interview questions

It was several years ago but I applied through the website and got an email from a HR manager. I then received an phone call and was screened by phone. It was the HR manager did the screening. I was invited into their office in DC to interview. There were 4 people in the room. The Research Director led the interview. I got called for a second interview and met some of the people I would work with. I filled out paperwork for HR and then got a call to say I was getting an offer. I accepted and signed paperwork.

Applied on LinkedIn. The HR contacted me and scheduled a telephone interview with the director. But the director didn't call me and neither the director nor the HR informed me. I emailed the HR but he never replied. I got in touch with the director himself on LinkedIn. He apologized and said the time zones mixed up since they had offices in US and UK, and they had many projects all over the world. He rescheduled an interview with me. The 30-minute interview was all about technical questions, such as how to calculate the sample size, how to do power estimation, etc. Then he asked me to email him back in Feb 2014 (because I couldn't start working until May). I did so, but never heard from him again!