condition mean min max ZT0-3 14.3301 13.6201 15.040099999999999 ZT4-7 8.544225 8.544225 8.544225 ZT8-11 8.016915 8.016915 8.016915 ZT12-15 0 0 0 ZT16-19 18.32765 18.32765 18.32765 ZT20-23 17.4911 17.4911 17.4911