condition mean min max ZT0-3 0.0717315 0.069431 0.074612 ZT4-7 0.34217349999999996 0.34217349999999996 0.34217349999999996 ZT8-11 0.572071 0.572071 0.572071 ZT12-15 0.63165275 0.4405715 0.8227340000000001 ZT16-19 0.4763765 0.4763765 0.4763765 ZT20-23 0.462176 0.462176 0.462176