condition mean min max ZT0-3 5.25 5.25 5.25 ZT4-7 16.6 16.6 16.6 ZT8-11 4.15 4.15 4.15 ZT12-15 17.2 17.2 17.2 ZT16-19 3.6 3.6 3.6 ZT20-23 7.8500000000000005 7.8500000000000005 7.8500000000000005