condition mean min max ZT0-3 42.632907 42.632907 42.632907 ZT4-7 46.9512495 46.9512495 46.9512495 ZT8-11 47.619545 47.619545 47.619545 ZT12-15 37.083558 37.083558 37.083558 ZT16-19 60.063676 60.063676 60.063676 ZT20-23 61.0225795 61.0225795 61.0225795