condition mean min max ZT0-3 43.669325375 42.40854107 44.93010968 ZT4-7 48.04043019 47.81650091 48.26435947 ZT8-11 47.46198437666666 47.08481086333333 47.83915789 ZT12-15 47.25692112 46.46278818333333 48.051054056666665 ZT16-19 47.77432824333333 45.67539912 49.873257366666664 ZT20-23 50.6623998 50.36831023 50.95648937