condition mean min max ZT0-3 383.20000000000005 383.20000000000005 383.20000000000005 ZT4-7 451.0 451.0 451.0 ZT8-11 366.4 366.4 366.4 ZT12-15 257.04999999999995 257.04999999999995 257.04999999999995 ZT16-19 292.65 292.65 292.65 ZT20-23 297.4 297.4 297.4