condition mean min max ZT0-3 94.4291247225 88.31764205 100.540607395 ZT4-7 74.161327675 69.30564928 79.01700607000001 ZT8-11 38.502087625 27.991450105000002 49.012725145 ZT12-15 6.714762074 3.70448485 9.725039298 ZT16-19 8.0938173845 7.592985497000001 8.594649272 ZT20-23 10.927282 9.385675105 12.468888895