condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.4761775 0.4761775 0.4761775 ZT8-11 0.0 0.0 0.0 ZT12-15 0.57704 0.0 1.15408 ZT16-19 0.788665 0.788665 0.788665 ZT20-23 0.3923485 0.3923485 0.3923485