condition mean min max ZT0-3 967.001288 967.001288 967.001288 ZT4-7 1191.2900435 1191.2900435 1191.2900435 ZT8-11 1220.3412705 1220.3412705 1220.3412705 ZT12-15 1101.5029905 1101.5029905 1101.5029905 ZT16-19 1043.3171165 1043.3171165 1043.3171165 ZT20-23 1015.891695 1015.891695 1015.891695