Depending on the job descriptions, I'd say you'll probably need to be able to describe how you would analyze common problems (i.e. how do you do a cluster analysis, how do you ensure it's statistically significant, etc.)
You might even be asked to do case studies, analyze some data and present the insights. It depends on the culture of the company and what role you'll be undertaking. I would say that it doesn't help if you are great at presenting.
