condition mean min max ZT0-3 65.95 65.95 65.95 ZT4-7 49.9 49.9 49.9 ZT8-11 40.75 40.75 40.75 ZT12-15 30.700000000000003 30.700000000000003 30.700000000000003 ZT16-19 13.8 13.8 13.8 ZT20-23 31.9 31.9 31.9