condition mean min max ZT0-3 14.625464 14.625464 14.625464 ZT4-7 14.4652705 14.4652705 14.4652705 ZT8-11 14.499858 14.499858 14.499858 ZT12-15 15.2920075 15.2920075 15.2920075 ZT16-19 15.6912175 15.6912175 15.6912175 ZT20-23 14.4917055 14.4917055 14.4917055