condition mean min max ZT0-3 7802.950000000001 7802.950000000001 7802.950000000001 ZT4-7 7409.3 7409.3 7409.3 ZT8-11 7117.6 7117.6 7117.6 ZT12-15 6552.15 6552.15 6552.15 ZT16-19 8163.55 8163.55 8163.55 ZT20-23 9117.099999999999 9117.099999999999 9117.099999999999