condition mean min max ZT0-3 52.61595 52.61595 52.61595 ZT4-7 54.389250000000004 54.389250000000004 54.389250000000004 ZT8-11 48.48755 48.48755 48.48755 ZT12-15 50.79795 50.79795 50.79795 ZT16-19 44.13565 44.13565 44.13565 ZT20-23 49.20415 49.20415 49.20415