condition mean min max ZT0-3 19.0 19.0 19.0 ZT4-7 10.1 10.1 10.1 ZT8-11 25.35 25.35 25.35 ZT12-15 52.550000000000004 52.550000000000004 52.550000000000004 ZT16-19 47.0 47.0 47.0 ZT20-23 19.0 19.0 19.0