condition mean min max ZT0-3 2037.236033 2037.236033 2037.236033 ZT4-7 2450.1145195 2450.1145195 2450.1145195 ZT8-11 2529.7215340000002 2529.7215340000002 2529.7215340000002 ZT12-15 2440.612728 2440.612728 2440.612728 ZT16-19 2476.752224 2476.752224 2476.752224 ZT20-23 2224.0288325 2224.0288325 2224.0288325