condition mean min max ZT0-3 561.7725 561.7725 561.7725 ZT4-7 284.1941825 284.1941825 284.1941825 ZT8-11 287.18865700000003 287.18865700000003 287.18865700000003 ZT12-15 360.117934 360.117934 360.117934 ZT16-19 351.036649 351.036649 351.036649 ZT20-23 315.6467285 315.6467285 315.6467285