condition mean min max ZT0-3 394.65224 394.65224 394.65224 ZT4-7 1006.4701295 1006.4701295 1006.4701295 ZT8-11 825.4134425 825.4134425 825.4134425 ZT12-15 640.2851115000001 640.2851115000001 640.2851115000001 ZT16-19 510.3822725 510.3822725 510.3822725 ZT20-23 467.308952 467.308952 467.308952