condition mean min max ZT0-3 132.10000000000002 132.10000000000002 132.10000000000002 ZT4-7 83.7 83.7 83.7 ZT8-11 98.05 98.05 98.05 ZT12-15 124.5 124.5 124.5 ZT16-19 211.5 211.5 211.5 ZT20-23 184.5 184.5 184.5