condition mean min max ZT0-3 2191.06313 2191.06313 2191.06313 ZT4-7 2171.281092 2171.281092 2171.281092 ZT8-11 2217.758735 2217.758735 2217.758735 ZT12-15 2239.2687955 2239.2687955 2239.2687955 ZT16-19 2178.334791 2178.334791 2178.334791 ZT20-23 2133.3535275 2133.3535275 2133.3535275