condition mean min max ZT0-3 10.37349 9.859195 10.887785 ZT4-7 14.24345 14.24345 14.24345 ZT8-11 14.12965 14.12965 14.12965 ZT12-15 0 0 0 ZT16-19 17.215899999999998 17.215899999999998 17.215899999999998 ZT20-23 14.0661 14.0661 14.0661