condition mean min max ZT0-3 0.6186225000000001 0.4173635 0.8198815 ZT4-7 3.78776 3.78776 3.78776 ZT8-11 1.746485 1.746485 1.746485 ZT12-15 0 0 0 ZT16-19 0.8760695000000001 0.8760695000000001 0.8760695000000001 ZT20-23 1.051407 1.051407 1.051407