condition mean min max ZT0-3 512.808951 512.808951 512.808951 ZT4-7 306.604858 306.604858 306.604858 ZT8-11 311.898354 311.898354 311.898354 ZT12-15 342.8491095 342.8491095 342.8491095 ZT16-19 535.077897 535.077897 535.077897 ZT20-23 464.34478049999996 464.34478049999996 464.34478049999996