Repeat tests for statistics and lower limit somewhat
Repeat tests for statistics and lower limit somewhat

Signed-off-by: Jonas Kalderstam <35a2c6fae61f8077aab61faa4019722abf05093c@kalderstam.se>

CamDavidsonPilon/lifelines,wavelets/lifelines,nerdless/lifelines,jstoxrocky/lifelines