condition mean min max ZT0-3 132.9 132.9 132.9 ZT4-7 53.9 53.9 53.9 ZT8-11 50.300000000000004 50.300000000000004 50.300000000000004 ZT12-15 59.75 59.75 59.75 ZT16-19 59.6 59.6 59.6 ZT20-23 90.95 90.95 90.95