condition mean min max ZT0-3 1.639735 0.0 3.24895 ZT4-7 0.0 0.0 0.0 ZT8-11 1.60231 1.60231 1.60231 ZT12-15 2.4266075000000003 1.736665 3.11655 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0