condition mean min max ZT0-3 60.0 60.0 60.0 ZT4-7 54.1 54.1 54.1 ZT8-11 63.3 63.3 63.3 ZT12-15 72.05 72.05 72.05 ZT16-19 56.449999999999996 56.449999999999996 56.449999999999996 ZT20-23 44.6 44.6 44.6