condition mean min max ZT0-3 14.5855175 14.41575 14.755285 ZT4-7 46.59045 46.59045 46.59045 ZT8-11 26.56995 26.56995 26.56995 ZT12-15 0 0 0 ZT16-19 11.36275 11.36275 11.36275 ZT20-23 13.77605 13.77605 13.77605