condition mean min max ZT0-3 0.2201533125 0.06783117 0.372475455 ZT4-7 0.54417907175 0.45428983600000006 0.6340683075 ZT8-11 1.08457854775 0.7568481985 1.412308897 ZT12-15 1.8927727020000003 1.7678554340000001 2.01768997 ZT16-19 1.67120244975 1.5047946295 1.8376102699999999 ZT20-23 2.310547626 2.1273925585 2.4937026935