I'm a former research assistant for social research, with a diploma in social assistance. After about 15 years of such research, mostly under the banner of "applied social gerontology", I was engaged with a teaching contract for introduction of empirical research and statistics in the departement for social assistance (Batchelor and Master) in the Kassel University. I had always a strong favor for programming statistical software and so I've some knowledge of the deeper insides of statistics as far as connected with linear algebra. In the last years I've re-discovered my sympathy with number theory and so I'm more active on the stat's sister forum at math.stackexchange currently.