condition mean min max ZT0-3 13.35 13.35 13.35 ZT4-7 23.4 23.4 23.4 ZT8-11 31.35 31.35 31.35 ZT12-15 12.95 12.95 12.95 ZT16-19 2.65 2.65 2.65 ZT20-23 14.350000000000001 14.350000000000001 14.350000000000001