condition mean min max ZT0-3 202.822959 202.822959 202.822959 ZT4-7 307.3465025 307.3465025 307.3465025 ZT8-11 368.850785 368.850785 368.850785 ZT12-15 266.289302 266.289302 266.289302 ZT16-19 207.2864935 207.2864935 207.2864935 ZT20-23 213.1904475 213.1904475 213.1904475