Statistician Walter Krämer with some of the statistics books he has written
A statistician is someone who works with theoretical or applied statistics. The profession exists in both the private and public sectors. It is common to combine statistical knowledge with expertise in other subjects.
Most employment as a statistician requires a minimum of a masters degree in statistics or a related field. Many professional statisticians have a PhD. Typical work includes collaborating with scientists, providing mathematical modeling, simulations, designing randomized experiments and randomized sampling plans, analyzing experimental or survey results, and forecasting future events (such as sales of a product).