Here are some old links from my time as a data scientist freelancer with background in mathematics:
Whatsapp Data Analysis
Automatic Feature Engineering
Umsatzprognose
Prognose Kundenbindung
Likert Skala Auswertung
Levene Test
Einstichproben t-Test
Einstichproben Gauss-Test
bike sharing
einfaktorielle Varianzanalyse ANOVA
Fragebogenauswertung
If you are interested in Galois-Theory,
here
you can find my diploma, where I compute the Galois groups of some polynomials.