condition mean min max ZT0-3 0.2598845 0.19925150000000003 0.3205175 ZT4-7 0.19742125 0.19742125 0.19742125 ZT8-11 0.601062 0.601062 0.601062 ZT12-15 0 0 0 ZT16-19 0.3917085 0.3917085 0.3917085 ZT20-23 0.39383250000000003 0.39383250000000003 0.39383250000000003