condition mean min max ZT0-3 107.691007 107.691007 107.691007 ZT4-7 100.8867985 100.8867985 100.8867985 ZT8-11 77.6058235 77.6058235 77.6058235 ZT12-15 116.0248325 116.0248325 116.0248325 ZT16-19 80.713111 80.713111 80.713111 ZT20-23 96.863529 96.863529 96.863529