condition mean min max ZT0-3 4.05 4.05 4.05 ZT4-7 2.6 2.6 2.6 ZT8-11 10.05 10.05 10.05 ZT12-15 1.6 1.6 1.6 ZT16-19 4.6 4.6 4.6 ZT20-23 2.4000000000000004 2.4000000000000004 2.4000000000000004