condition mean min max ZT0-3 209.14999999999998 209.14999999999998 209.14999999999998 ZT4-7 59.4 59.4 59.4 ZT8-11 114.95 114.95 114.95 ZT12-15 106.5 106.5 106.5 ZT16-19 136.35 136.35 136.35 ZT20-23 218.1 218.1 218.1