condition mean min max ZT0-3 4.15 4.15 4.15 ZT4-7 7.3 7.3 7.3 ZT8-11 20.05 20.05 20.05 ZT12-15 6.45 6.45 6.45 ZT16-19 10.35 10.35 10.35 ZT20-23 4.199999999999999 4.199999999999999 4.199999999999999