condition mean min max ZT0-3 13.871986 13.871986 13.871986 ZT4-7 37.1548 37.1548 37.1548 ZT8-11 22.235156 22.235156 22.235156 ZT12-15 12.9636235 12.9636235 12.9636235 ZT16-19 11.2285155 11.2285155 11.2285155 ZT20-23 12.881017499999999 12.881017499999999 12.881017499999999