condition mean min max ZT0-3 58.586333 58.586333 58.586333 ZT4-7 50.790617499999996 50.790617499999996 50.790617499999996 ZT8-11 49.9153535 49.9153535 49.9153535 ZT12-15 47.0703 47.0703 47.0703 ZT16-19 85.083505 85.083505 85.083505 ZT20-23 80.7787525 80.7787525 80.7787525