condition mean min max ZT0-3 13.959875 13.11135 14.808399999999999 ZT4-7 7.52958 7.52958 7.52958 ZT8-11 6.086270000000001 6.086270000000001 6.086270000000001 ZT12-15 0 0 0 ZT16-19 12.6369 12.6369 12.6369 ZT20-23 12.448550000000001 12.448550000000001 12.448550000000001