condition mean min max ZT0-3 145.509052 145.509052 145.509052 ZT4-7 126.0625355 126.0625355 126.0625355 ZT8-11 114.39397149999999 114.39397149999999 114.39397149999999 ZT12-15 136.8054075 136.8054075 136.8054075 ZT16-19 158.1690295 158.1690295 158.1690295 ZT20-23 220.5940535 220.5940535 220.5940535