It says "In the normality tests family / I want the Shapiro-Wilk / ? / My dad is a statistician".
Why it is funny: because there are hundreds of statistical tests, and even up to a dozen for the almost same purpose; so we could really make up an actual "happy families" card game. Have a nice sunday afternoon, Sir!
This one sells, well, rather normally.
This T-shirt is made with 100% coton, ringspun technology. It has an exceptionnaly high thickness, making it both robust and pleasant to wear. The design is manually head-transfered to the fabric via the flex technology. This T-shirt can be washed inside-out at 40°C. No tumble dryer. If you damage the printed layer by accident (or tumble dryer), iron it through a parchment paper to smooth it again.