condition mean min max ZT0-3 71.1 71.1 71.1 ZT4-7 58.4 58.4 58.4 ZT8-11 53.25 53.25 53.25 ZT12-15 112.8 112.8 112.8 ZT16-19 105.44999999999999 105.44999999999999 105.44999999999999 ZT20-23 87.35 87.35 87.35