condition mean min max ZT0-3 694.0 694.0 694.0 ZT4-7 612.4 612.4 612.4 ZT8-11 547.7 547.7 547.7 ZT12-15 599.25 599.25 599.25 ZT16-19 611.3499999999999 611.3499999999999 611.3499999999999 ZT20-23 788.0 788.0 788.0