condition mean min max ZT0-3 10.95 10.95 10.95 ZT4-7 5.1 5.1 5.1 ZT8-11 18.1 18.1 18.1 ZT12-15 3.05 3.05 3.05 ZT16-19 16.15 16.15 16.15 ZT20-23 10.95 10.95 10.95