condition mean min max ZT0-3 0.02907775 0.02907775 0.02907775 ZT4-7 0.08046880000000001 0.08046880000000001 0.08046880000000001 ZT8-11 0.0219567 0.0219567 0.0219567 ZT12-15 0.0465815 0.0465815 0.0465815 ZT16-19 0.0 0.0 0.0 ZT20-23 0.130933 0.130933 0.130933