condition mean min max ZT0-3 49.181608 49.181608 49.181608 ZT4-7 97.618579 97.618579 97.618579 ZT8-11 198.8648435 198.8648435 198.8648435 ZT12-15 238.616256 238.616256 238.616256 ZT16-19 383.590185 383.590185 383.590185 ZT20-23 304.1283215 304.1283215 304.1283215