condition mean min max ZT0-3 1.10300725 0.9360945 1.26992 ZT4-7 3.597725 3.597725 3.597725 ZT8-11 1.263773 1.263773 1.263773 ZT12-15 0 0 0 ZT16-19 1.56063 1.56063 1.56063 ZT20-23 2.8235 2.8235 2.8235