condition mean min max ZT0-3 58.9029 56.908500000000004 60.8973 ZT4-7 63.331450000000004 63.331450000000004 63.331450000000004 ZT8-11 152.2855 152.2855 152.2855 ZT12-15 0 0 0 ZT16-19 187.184 187.184 187.184 ZT20-23 111.1075 111.1075 111.1075