condition mean min max ZT0-3 21.202279 21.202279 21.202279 ZT4-7 24.6067195 24.6067195 24.6067195 ZT8-11 39.904777 39.904777 39.904777 ZT12-15 35.843277 35.843277 35.843277 ZT16-19 44.3208105 44.3208105 44.3208105 ZT20-23 35.8742735 35.8742735 35.8742735