condition mean min max ZT0-3 1.23618775 0.6955155 1.77686 ZT4-7 0.7368135 0.7368135 0.7368135 ZT8-11 0.927705 0.927705 0.927705 ZT12-15 0 0 0 ZT16-19 0.7281035 0.7281035 0.7281035 ZT20-23 1.206655 1.206655 1.206655