condition mean min max ZT0-3 0.3330356666666667 0.0 0.650728 ZT4-7 0.0 0.0 0.0 ZT8-11 1.6963484999999998 1.6963484999999998 1.6963484999999998 ZT12-15 0.20133275 0.0 0.4026655 ZT16-19 0.3530345 0.3530345 0.3530345 ZT20-23 0.0 0.0 0.0