condition mean min max ZT0-3 70.610814 70.610814 70.610814 ZT4-7 95.6882515 95.6882515 95.6882515 ZT8-11 120.63749899999999 120.63749899999999 120.63749899999999 ZT12-15 100.0227075 100.0227075 100.0227075 ZT16-19 95.44349 95.44349 95.44349 ZT20-23 92.333454 92.333454 92.333454