condition mean min max ZT0-3 0.5057977499999999 0.49198949999999997 0.519606 ZT4-7 0.438643 0.438643 0.438643 ZT8-11 0.7063415000000001 0.7063415000000001 0.7063415000000001 ZT12-15 0 0 0 ZT16-19 0.7035465000000001 0.7035465000000001 0.7035465000000001 ZT20-23 0.4920725 0.4920725 0.4920725