condition mean min max ZT0-3 54.35 54.35 54.35 ZT4-7 53.4 53.4 53.4 ZT8-11 41.7 41.7 41.7 ZT12-15 48.0 48.0 48.0 ZT16-19 54.800000000000004 54.800000000000004 54.800000000000004 ZT20-23 35.5 35.5 35.5