condition mean min max ZT0-3 0.008832503 0.0 0.017665006 ZT4-7 0.006454957 0.0 0.012909914 ZT8-11 0.18729966574999998 0.03918677 0.3354125615 ZT12-15 0.75003281425 0.581568638 0.9184969905 ZT16-19 0.5985591985000001 0.5780186455 0.6190997515 ZT20-23 0.18217031975 0.1735104295 0.19083021