condition mean min max ZT0-3 11.10188 11.10188 11.10188 ZT4-7 11.195699999999999 11.195699999999999 11.195699999999999 ZT8-11 11.66997 11.66997 11.66997 ZT12-15 10.411847999999999 10.411847999999999 10.411847999999999 ZT16-19 10.693199 10.693199 10.693199 ZT20-23 10.524742499999999 10.524742499999999 10.524742499999999