condition mean min max ZT0-3 62.15 62.15 62.15 ZT4-7 49.7 49.7 49.7 ZT8-11 64.75 64.75 64.75 ZT12-15 24.400000000000002 24.400000000000002 24.400000000000002 ZT16-19 47.35 47.35 47.35 ZT20-23 75.6 75.6 75.6