condition mean min max ZT0-3 0.031216766666666663 0.0 0.09365029999999999 ZT4-7 0.09003235000000001 0.09003235000000001 0.09003235000000001 ZT8-11 0.0 0.0 0.0 ZT12-15 0.069646 0.0 0.139292 ZT16-19 0.0 0.0 0.0 ZT20-23 0.195674 0.195674 0.195674