Tend very much to agree with the previous comments. Terms like "Big data", "Data mining" and "Data scientist" are used far to randomly these days often with no real understanding. One project I am involved with involves three of us - I understand the data structure and write the queries, a medically qualified person raises the queries and a statistician checks that they are statistically relevant. As we have all seen with medical data the media can easily distort statistics even on a weekly basis!.