condition mean min max ZT0-3 2.55 2.55 2.55 ZT4-7 0.4 0.4 0.4 ZT8-11 11.350000000000001 11.350000000000001 11.350000000000001 ZT12-15 1.75 1.75 1.75 ZT16-19 17.15 17.15 17.15 ZT20-23 2.55 2.55 2.55