condition mean min max ZT0-3 10.45 10.45 10.45 ZT4-7 2.3 2.3 2.3 ZT8-11 23.8 23.8 23.8 ZT12-15 4.2 4.2 4.2 ZT16-19 1.95 1.95 1.95 ZT20-23 12.899999999999999 12.899999999999999 12.899999999999999