condition mean min max ZT0-3 72.850335 72.850335 72.850335 ZT4-7 80.6272645 80.6272645 80.6272645 ZT8-11 130.374749 130.374749 130.374749 ZT12-15 128.275954 128.275954 128.275954 ZT16-19 139.71880199999998 139.71880199999998 139.71880199999998 ZT20-23 90.27042449999999 90.27042449999999 90.27042449999999