condition mean min max ZT0-3 59.9 59.9 59.9 ZT4-7 141.7 141.7 141.7 ZT8-11 51.95 51.95 51.95 ZT12-15 110.4 110.4 110.4 ZT16-19 90.4 90.4 90.4 ZT20-23 72.19999999999999 72.19999999999999 72.19999999999999