condition mean min max ZT0-3 1184.539749 1184.539749 1184.539749 ZT4-7 804.25783 804.25783 804.25783 ZT8-11 927.5785814999999 927.5785814999999 927.5785814999999 ZT12-15 1123.4242485 1123.4242485 1123.4242485 ZT16-19 1103.100605 1103.100605 1103.100605 ZT20-23 875.294129 875.294129 875.294129