condition mean min max ZT0-3 39.58755 39.58755 39.58755 ZT4-7 20.977249999999998 20.977249999999998 20.977249999999998 ZT8-11 52.4473 52.4473 52.4473 ZT12-15 72.12135 72.12135 72.12135 ZT16-19 82.7246 82.7246 82.7246 ZT20-23 54.678399999999996 54.678399999999996 54.678399999999996