condition mean min max ZT0-3 271.608004 271.608004 271.608004 ZT4-7 531.1431494999999 531.1431494999999 531.1431494999999 ZT8-11 630.2258420000001 630.2258420000001 630.2258420000001 ZT12-15 348.96191250000004 348.96191250000004 348.96191250000004 ZT16-19 476.14547600000003 476.14547600000003 476.14547600000003 ZT20-23 387.1250835 387.1250835 387.1250835