condition mean min max ZT0-3 2363.588106 2363.588106 2363.588106 ZT4-7 5957.7800255 5957.7800255 5957.7800255 ZT8-11 6805.606358 6805.606358 6805.606358 ZT12-15 6110.758795 6110.758795 6110.758795 ZT16-19 2527.769733 2527.769733 2527.769733 ZT20-23 1476.067407 1476.067407 1476.067407