condition mean min max ZT0-3 54.150000000000006 54.150000000000006 54.150000000000006 ZT4-7 28.2 28.2 28.2 ZT8-11 29.05 29.05 29.05 ZT12-15 54.45 54.45 54.45 ZT16-19 39.8 39.8 39.8 ZT20-23 44.9 44.9 44.9