condition mean min max ZT0-3 99.924371 99.924371 99.924371 ZT4-7 73.7670455 73.7670455 73.7670455 ZT8-11 70.596744 70.596744 70.596744 ZT12-15 68.328332 68.328332 68.328332 ZT16-19 142.630089 142.630089 142.630089 ZT20-23 153.6665375 153.6665375 153.6665375