condition mean min max ZT0-3 4600.05 4600.05 4600.05 ZT4-7 3789.6 3789.6 3789.6 ZT8-11 3471.3500000000004 3471.3500000000004 3471.3500000000004 ZT12-15 2886.45 2886.45 2886.45 ZT16-19 3518.3999999999996 3518.3999999999996 3518.3999999999996 ZT20-23 4456.35 4456.35 4456.35