condition mean min max ZT0-3 78.80000000000001 78.80000000000001 78.80000000000001 ZT4-7 108.9 108.9 108.9 ZT8-11 191.2 191.2 191.2 ZT12-15 124.25 124.25 124.25 ZT16-19 286.04999999999995 286.04999999999995 286.04999999999995 ZT20-23 209.8 209.8 209.8