condition mean min max ZT0-3 0.6478195 0.6478195 0.6478195 ZT4-7 0.49328099999999997 0.49328099999999997 0.49328099999999997 ZT8-11 0.5843005 0.5843005 0.5843005 ZT12-15 0.1968005 0.1968005 0.1968005 ZT16-19 0.09140455 0.09140455 0.09140455 ZT20-23 0.3813805 0.3813805 0.3813805