condition mean min max ZT0-3 1.14688 1.14688 1.14688 ZT4-7 0.6065845 0.6065845 0.6065845 ZT8-11 0.9994975 0.9994975 0.9994975 ZT12-15 2.765505 2.765505 2.765505 ZT16-19 2.955825 2.955825 2.955825 ZT20-23 1.6315300000000001 1.6315300000000001 1.6315300000000001