condition mean min max ZT0-3 5005.700000000001 5005.700000000001 5005.700000000001 ZT4-7 114.3 114.3 114.3 ZT8-11 92.75 92.75 92.75 ZT12-15 47.8 47.8 47.8 ZT16-19 65.6 65.6 65.6 ZT20-23 1366.25 1366.25 1366.25