condition mean min max ZT0-3 35.659246 35.659246 35.659246 ZT4-7 18.3136945 18.3136945 18.3136945 ZT8-11 15.999153 15.999153 15.999153 ZT12-15 17.3707985 17.3707985 17.3707985 ZT16-19 15.0119695 15.0119695 15.0119695 ZT20-23 11.333074 11.333074 11.333074