condition mean min max ZT0-3 0.73353 0.6970525 0.7700075 ZT4-7 0.8820285 0.8820285 0.8820285 ZT8-11 1.2346375 1.2346375 1.2346375 ZT12-15 0 0 0 ZT16-19 1.464815 1.464815 1.464815 ZT20-23 1.0968775000000002 1.0968775000000002 1.0968775000000002