condition mean min max ZT0-3 821.55 821.55 821.55 ZT4-7 476.7 476.7 476.7 ZT8-11 515.8 515.8 515.8 ZT12-15 458.4 458.4 458.4 ZT16-19 598.7 598.7 598.7 ZT20-23 737.25 737.25 737.25