condition mean min max ZT0-3 0.182381927 0.02847411 0.336289744 ZT4-7 0.0683959225 0.0248521315 0.1119397135 ZT8-11 0.44940518499999993 0.182410845 0.7163995249999999 ZT12-15 0.28318622625 0.14577944599999998 0.42059300650000003 ZT16-19 0.081222957 0.07362013 0.08882578399999999 ZT20-23 0.0315302205 0.0 0.063060441