condition mean min max ZT0-3 117.0 117.0 117.0 ZT4-7 183.6 183.6 183.6 ZT8-11 156.8 156.8 156.8 ZT12-15 115.44999999999999 115.44999999999999 115.44999999999999 ZT16-19 112.35 112.35 112.35 ZT20-23 89.4 89.4 89.4