condition mean min max ZT0-3 0.850152 0.850152 0.850152 ZT4-7 0.5462125 0.5462125 0.5462125 ZT8-11 0.4478235 0.4478235 0.4478235 ZT12-15 0.9772190000000001 0.9772190000000001 0.9772190000000001 ZT16-19 1.730265 1.730265 1.730265 ZT20-23 1.11771 1.11771 1.11771