condition mean min max ZT0-3 28.758650000000003 27.7071 29.810200000000002 ZT4-7 53.93770000000001 53.93770000000001 53.93770000000001 ZT8-11 31.580849999999998 31.580849999999998 31.580849999999998 ZT12-15 0 0 0 ZT16-19 37.44145 37.44145 37.44145 ZT20-23 35.52725 35.52725 35.52725