condition mean min max ZT0-3 99.98085 99.98085 99.98085 ZT4-7 49.882400000000004 49.882400000000004 49.882400000000004 ZT8-11 38.2774 38.2774 38.2774 ZT12-15 32.407849999999996 32.407849999999996 32.407849999999996 ZT16-19 55.9818 55.9818 55.9818 ZT20-23 72.0969 72.0969 72.0969