condition mean min max ZT0-3 265.1 265.1 265.1 ZT4-7 73.4 73.4 73.4 ZT8-11 111.65 111.65 111.65 ZT12-15 73.95 73.95 73.95 ZT16-19 134.5 134.5 134.5 ZT20-23 235.14999999999998 235.14999999999998 235.14999999999998